{"id":1079,"date":"2026-09-27T16:50:30","date_gmt":"2026-09-27T08:50:30","guid":{"rendered":"https:\/\/blog.nanoturtle.cn\/?p=1079"},"modified":"2026-09-27T17:09:21","modified_gmt":"2026-09-27T09:09:21","slug":"galaxy-s24-dirtyfrag-kernel","status":"publish","type":"post","link":"https:\/\/blog.nanoturtle.cn\/index.php\/2026\/09\/27\/galaxy-s24-dirtyfrag-kernel\/","title":{"rendered":"S24 \u4e3a\u4ec0\u4e48\u8dd1\u4e0d\u4e86 DirtyFrag"},"content":{"rendered":"
\n\t\t\t\t
<\/div>\n\t\t\t\t
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\n\t\t\t\t\t<\/svg><\/span>\n\t\t\t\t\t\u6458\u8981\u751f\u6210\u4e2d<\/span>\n\t\t\t\t\t<\/path><\/svg><\/span>\n\t\t\t\t<\/div>\n\t\t\t\t
DirtyFrag\u5728GalaxyS23\uff085.15\uff09\u548cS25\uff086.6.98\uff09\u4e0a\u53ef\u8fd0\u884c\uff0c\u5728S24\u5168\u7cfb\uff086.1.x\uff09\u5374\u5931\u8d25\u3002\u6587\u7ae0\u6307\u51fa\uff0c\u5173\u952e\u969c\u788d\u662f\u63d0\u6743\u94fe\u552f\u4e00\u7684\u5199\u539f\u8bed\u2014\u2014\u7be1\u6539\u53ea\u8bfb\u6587\u4ef6\u9875\u7f13\u5b58\uff0c\u800c\u975e\u540e\u7eed\u6a21\u5757\u6ce8\u5165\u6216SELinux\u6b65\u9aa4\u3002\u4f5c\u8005\u4eceESP\u89e3\u5bc6\u6e90\u7801\u63a8\u5bfc\u51faICV\u8986\u76d6\u8303\u56f4\u6052\u4e3a40\u5b57\u8282\uff0c\u968f\u5305ICV\u957f\u5ea6\u5fc5\u987b\u5339\u914dSA\u7684authsize\uff0c\u5e76\u901a\u8fc7\u53ef\u8bc1\u4f2a\u9884\u6d4b\u548c\u771f\u673a\u6d4b\u8bd5\u6392\u67e5IV\u3001HMAC\u7b49\u6784\u9020\u9519\u8bef\uff1b\u76ee\u6807\u6587\u4ef6MD5\u524d\u540e\u672a\u53d8\uff0c\u652f\u6301\u5176\u7ed3\u6784\u6027\u4e0d\u901a\u7684\u7ed3\u8bba\u3002<\/div>
\u2014 AI\u751f\u6210\uff0c\u4ec5\u4f9b\u53c2\u8003<\/span><\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n

<\/h1>\n\n\n\n

\u2014\u2014\u628a\u7ed3\u8bba\u9489\u6b7b\u5728\u4e00\u4e2a\u53ef\u8bc1\u4f2a\u7684\u9884\u6d4b\u4e0a<\/h2>\n\n\n\n
\n

\u8fd9\u7bc7\u8bb2\u4e00\u4ef6\u6709\u70b9\u626b\u5174\u7684\u4e8b\uff1aDirtyFrag\uff08CVE-2026-43284\uff09\u8fd9\u5957 2026 \u5e74\u6700\u9999\u7684\u514d\u89e3\u9501 root \u65b9\u6848\uff0c
\u5728 Galaxy S25\uff086.6 \u5185\u6838\uff09\u548c S23\uff085.15 \u5185\u6838\uff09\u4e0a\u90fd\u80fd\u8dd1\u901a\uff0c\u5728 Galaxy S24 \u5168\u7cfb\u4e0a\u5374\u600e\u4e48\u90fd\u8dd1\u4e0d\u4e86<\/strong>\uff0c
\u800c\u4e14\u4e0d\u662f”\u6ca1\u8c03\u597d”\u2014\u2014\u662f\u7ed3\u6784\u6027\u4e0d\u901a\u3002<\/p>\n\n\n\n

\u6211\u4e0d\u60f3\u5199”\u56e0\u4e3a\u6211\u4eec\u5b89\u5168\u8865\u4e01\u6bd4\u5b83\u65b0”\uff0c\u90a3\u53e5\u8bdd\u65e2\u4e0d\u89e3\u91ca\u4e5f\u4e0d\u53ef\u4fe1\u3002\u4e0b\u9762\u662f\u6211\u600e\u4e48\u628a\u8fd9\u4ef6\u4e8b\u9489\u6b7b\u7684\uff1a
\u4ece\u5185\u6838\u6e90\u7801\u63a8\u51fa\u4e00\u4e2a\u80fd\u7b97\u51fa\u5177\u4f53\u6574\u6570<\/strong>\u7684\u9884\u6d4b\uff0c\u7136\u540e\u5728\u771f\u673a\u4e0a\u6570\u51fa\u90a3\u4e2a\u6574\u6570\u3002<\/p>\n<\/blockquote>\n\n\n\n

\n\n\n\n

0x00 \u5f00\u573a\uff1a\u522b\u4eba\u80fd\u8dd1\uff0c\u4e3a\u4ec0\u4e48\u6211\u8fd9\u91cc\u4e0d\u884c<\/h2>\n\n\n\n

\u4e8b\u60c5\u7684\u8d77\u70b9\u662f\u4e00\u4e2a\u5f88\u6734\u7d20\u7684\u5bf9\u6bd4\uff1a<\/p>\n\n\n\n

\u8bbe\u5907<\/th>\u5185\u6838<\/th>DirtyFrag<\/th><\/tr><\/thead>
Galaxy S23 \u7cfb\u5217<\/td>5.15<\/td>\u2705 \u673a\u4e3b\u5b9e\u6d4b\u80fd\u8dd1<\/td><\/tr>
Galaxy S25 Ultra\uff08SM-S938B\uff09<\/td>6.6.98<\/td>\u2705 \u6709\u516c\u5f00\u79fb\u690d\uff0c\u8fd8\u80fd\u5f00\u673a\u81ea\u52a8\u6062\u590d root<\/td><\/tr>
Galaxy S24 \u5168\u7cfb\uff08SM-S9280\u2026\uff09<\/strong><\/td>6.1.x<\/strong><\/td>\u274c \u6211\u4eec\u5b9e\u6d4b\u8dd1\u4e0d\u4e86<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

DirtyFrag \u7684\u5438\u5f15\u529b\u5728\u4e8e\u5b83\u7684\u6027\u8d28\uff1a\u786e\u5b9a\u6027<\/strong>\uff08\u4e0d\u9760\u7ade\u6001\uff09\u3001\u5931\u8d25\u4e0d panic<\/strong>\u3001\u53ea\u6539\u5185\u5b58\u91cc\u7684 page cache<\/strong>\u3001
\u91cd\u542f\u5373\u8fd8\u539f\u2014\u2014\u5bf9 bootloader \u5df2\u9501\u5b9a\u3001\u53c8\u4e0d\u60f3\u6bcf\u6b21\u624b\u52a8\u8dd1\u4e00\u904d\u5de5\u5177\u7684\u4eba\u6765\u8bf4\uff0c\u8fd9\u51e0\u4e4e\u662f\u7406\u60f3\u89e3\u3002<\/p>\n\n\n\n

\u6240\u4ee5\u5f53\u81ea\u7814\u7684\u79fb\u690d\u5728\u6211\u4eec\u624b\u4e0a\u5931\u8d25\u65f6\uff0c\u7b2c\u4e00\u53cd\u5e94\u4e00\u5b9a\u662f”\u6211\u4eec\u54ea\u91cc\u5199\u9519\u4e86”\uff1a
IV \u7b97\u9519\u4e86\uff1fHMAC \u7b97\u9519\u4e86\uff1fICV \u957f\u5ea6\u731c\u9519\u4e86\uff1fSA \u6ca1\u5efa\u8d77\u6765\uff1f\u5305\u6ca1\u53d1\u51fa\u53bb\uff1f<\/p>\n\n\n\n

\u8fd9\u4e9b\u6000\u7591\u6700\u540e\u5168\u90e8\u88ab\u6392\u9664\u3002\u800c\u6392\u9664\u5b83\u4eec\u9760\u7684\u4e0d\u662f\u53cd\u590d\u8bd5\u53c2\u6570\uff0c\u800c\u662f\u4e00\u6761\u80fd\u7b97\u51fa\u6574\u6570\u7684\u5224\u636e<\/strong>\u3002<\/p>\n\n\n\n

\n\n\n\n

0x01 \u5148\u628a\u94fe\u6761\u62c6\u5f00<\/h2>\n\n\n\n

0x01-1 \u5b8c\u6574\u94fe\u6761\u957f\u4ec0\u4e48\u6837<\/h3>\n\n\n\n

\u6709\u516c\u5f00\u79fb\u690d\u628a\u5b83\u4e32\u6210\u8fd9\u6837\uff08\u6211\u5bf9\u7740\u6e90\u7801\u9010\u6761\u6838\u8fc7\uff0c\u673a\u4e3b\u7684\u63cf\u8ff0\u548c\u5b9e\u73b0\u662f\u5bf9\u5f97\u4e0a\u7684\uff09\uff1a<\/p>\n\n\n\n

\u2460 \u501f crash_dump64 \u7a81\u7834\u6c99\u76d2  \u2192  \u83b7\u5f97 vendor \u8bfb\u6743\u9650\n\u2461 \u7528 DirtyFrag \u7be1\u6539\u53ea\u8bfb\u6587\u4ef6\u7684\u9875\u7f13\u5b58        \u2190 \u5168\u94fe\u552f\u4e00\u7684\u5199\u539f\u8bed\n\u2462 \u628a\u5185\u6838\u6a21\u5757\u6ce8\u5165\u5382\u5546\u5e93\uff08libstagefrighthw.so\uff09\u7684\u9875\u7f13\u5b58\n\u2463 \u6302\u94a9 libc \/ libc++\uff0c\u7b49\u89e6\u53d1\n\u2464 modprobe \u52a0\u8f7d\u6a21\u5757\u65f6\u89e6\u53d1\u94a9\u5b50\n\u2465 \u52a0\u8f7d dirtyfrag.ko \u8fdb\u5185\u6838\n\u2466 \u5173\u95ed SELinux\n\u2467 bind mount logcat\uff0c\u542f\u52a8 KernelSU\n\u2468 \u5b8c\u6210\u65e0\u75d5\u8ff9\u4e34\u65f6 root<\/code><\/pre>\n\n\n\n
0x01-2 \u8c01\u662f\u652f\u70b9<\/h3>\n\n\n\n
\u8fd9\u91cc\u6709\u4ef6\u4e8b\u5fc5\u987b\u5148\u8bf4\u6e05\u695a\uff1a\u8fd9\u6761\u94fe\u53ea\u6709\u4e00\u628a\u94a5\u5319<\/strong>\u3002<\/p>\n\n\n\n
\u2462 \u9700\u8981 \u2461\uff08\u628a\u6a21\u5757\u5199\u8fdb\u53ea\u8bfb\u7684\u5382\u5546\u5e93\uff09+ \u2460 \uff08\u8bfb vendor \u6587\u4ef6\u7b97 IV\uff09\uff1b
\u2463 \u9700\u8981 \u2461\uff1b\u2464 \u4f9d\u8d56 \u2463\uff1b\u2465 \u4f9d\u8d56 \u2464\u3002<\/p>\n\n\n\n
\u4e5f\u5c31\u662f\u8bf4\uff0c\u2461 \u4e00\u65e6\u4e0d\u6210\u7acb\uff0c\u540e\u9762\u5168\u662f\u7a7a\u8c08<\/strong>\u2014\u2014\u6362 ksud\u3001\u8865\u53c2\u6570\u69fd\u3001\u6539 LKM\u3001\u8c03 SELinux\uff0c
\u8fd9\u4e9b”\u4e0b\u6e38\u5de5\u4f5c”\u505a\u5f97\u518d\u6f02\u4eae\u90fd\u6ca1\u7528\uff0c\u56e0\u4e3a\u6839\u672c\u8d70\u4e0d\u5230\u90a3\u4e00\u6b65\u3002<\/p>\n\n\n\n
\u6211\u4eec\u540e\u6765\u786e\u5b9e\u5728\u771f\u673a\u4e0a\u770b\u5230\u5b83\u6b7b\u5728 \u2461\uff1a\u76ee\u6807\u6587\u4ef6 crash_dump64<\/code> \u7684 md5 \u524d\u540e\u4e00\u5b57\u672a\u53d8\u3002
\uff08\u987a\u4fbf\uff0c\u8fd9\u4e00\u6761\u4e5f\u8bf4\u660e\uff1a\u6709\u4eba\u53cd\u9988”\u6211\u5728 S23U \u4e0a\u7528\u7684\u662f ROOT_s23 \u90a3\u5957 ksud\uff0c\u6253\u4e86\u4e2a\u8df3\u8f6c\u69fd\u8865\u4e01\u5c31\u597d\u4e86”\u2014\u2014
\u90a3\u662f\u94fe\u6761 \u2465\u2466\u2467 \u6bb5\u7684\u6d3b\uff0c\u5c5e\u4e8e”\u62ff\u5230\u5199\u539f\u8bed\u4e4b\u540e”\uff0c\u5728 S24 \u4e0a\u4e0d\u89e3\u51b3\u4efb\u4f55\u95ee\u9898\u3002\uff09<\/p>\n\n\n\n
\n\n\n\n
0x02 \u539f\u7406\uff1a\u62c6\u5230\u80fd\u81ea\u5df1\u5199\u51fa\u6765<\/h2>\n\n\n\n
\u8fd9\u4e00\u8282\u662f\u5168\u6587\u7684\u5730\u57fa\u3002\u8981\u770b\u61c2\u540e\u9762\u4e3a\u4ec0\u4e48”\u6784\u9020\u662f\u5bf9\u7684\u4f46\u8fd8\u662f\u5199\u4e0d\u8fdb\u53bb”\uff0c\u5f97\u5148\u77e5\u9053\u5185\u6838\u5230\u5e95\u8ba4\u4ec0\u4e48\u3002<\/p>\n\n\n\n
0x02-1 \u62a5\u6587\u957f\u4ec0\u4e48\u6837<\/h3>\n\n\n\n
[ ESP \u5934 8 ][ IV 16 ][ \u5bc6\u6587 = \u6587\u4ef6\u9875 16 ][ ICV A ]\n     \u2191 SPI+Seq    \u2191 \u7f51\u7edc\u5e8f     \u2191 \u8fd9\u6bb5\u6765\u81ea\u9875\u7f13\u5b58      \u2191 \u957f\u5ea6 A = authsize<\/code><\/pre>\n\n\n\n
\u5957\u8def\u662f\uff1a\u628a\u76ee\u6807\u6587\u4ef6\u7684\u9875\u7f13\u5b58\u9875\u7528 splice()<\/code> \u9001\u8fdb\u7ba1\u9053\uff0c\u518d splice()<\/code> \u5230 UDP socket\u3002
\u5982\u679c\u5185\u6838\u5728\u8fd9\u6761\u53d1\u9001\u8def\u5f84\u4e0a\u662f\u96f6\u62f7\u8d1d<\/strong>\u7684\uff0c\u90a3\u4e48\u8fd9\u4e00\u9875\u5c31\u4f1a\u88ab\u539f\u6837\u6302\u8fdb skb \u7684 frag<\/strong>\uff1b
\u4e4b\u540e ESP \u8f93\u5165\u8def\u5f84\u5728\u8fd9\u4e2a frag \u4e0a\u505a\u5c31\u5730\u89e3\u5bc6<\/strong>\uff0c\u5199\u51fa\u6765\u7684\u660e\u6587\u5c31\u76f4\u63a5\u843d\u5728\u6587\u4ef6\u7684\u9875\u7f13\u5b58\u91cc\u2014\u2014
\u4e0d\u9700\u8981\u5199\u6743\u9650\u3001\u7ed5\u8fc7 COW\u3001\u7ed5\u8fc7\u53ea\u8bfb\u6302\u8f7d\u3002<\/p>\n\n\n\n
0x02-2 \u5185\u6838\u662f”\u5148\u9a8c ICV\uff0c\u518d\u89e3\u5bc6”<\/h3>\n\n\n\n
crypto\/authenc.c<\/code>\uff1a<\/p>\n\n\n\n
\/* authenc = auth + crypt \u7684\u7ec4\u5408\u3002\u89e3\u5bc6\u8def\u5f84\u5148\u7b97 ICV \u5e76\u6bd4\u5bf9\uff0c\n   \u9a8c\u8fc7\u4e86\u624d\u771f\u6b63\u8c03\u7528 skcipher \u89e3\u5bc6 \u2014\u2014 \u987a\u5e8f\u5f88\u5173\u952e\uff1a\n   \u8ba4\u8bc1\u4e0d\u8fc7\uff0c\u89e3\u5bc6\u6839\u672c\u4e0d\u4f1a\u53d1\u751f\uff0c\u4e5f\u5c31\u6ca1\u6709\u4efb\u4f55\u5199\u5165\u3002 *\/\nahash_request_set_crypt(ahreq, req->src, hash,\n                        req->assoclen + req->cryptlen - authsize);\nerr = crypto_ahash_digest(ahreq);\n...\nreturn crypto_authenc_decrypt_tail(req, ...);   \/* \u9a8c\u8fc7\u4e86\u624d\u5230\u8fd9\u91cc *\/<\/code><\/pre>\n\n\n\n
net\/ipv4\/esp4.c<\/code> \u7684\u8f93\u5165\u4fa7\uff1a<\/p>\n\n\n\n
int ivlen = crypto_aead_ivsize(aead);                        \/* 16 *\/\nint elen  = skb->len - sizeof(struct ip_esp_hdr) - ivlen;\nint assoclen = sizeof(struct ip_esp_hdr);                    \/* 8 *\/\n\n\/* src == dst\uff1a\u8fd9\u5c31\u662f\"\u5c31\u5730\"\u7684\u610f\u601d \u2014\u2014 \u89e3\u5bc6\u7ed3\u679c\u8986\u76d6\u5728\u539f\u6587\u6240\u5728\u7684\u5185\u5b58\u4e0a *\/\naead_request_set_crypt(req, sg, sg, elen + ivlen, iv);\naead_request_set_ad(req, assoclen);<\/code><\/pre>\n\n\n\n
0x02-3 \u8986\u76d6\u8303\u56f4\u5176\u5b9e\u662f\u4e2a\u6052\u7b49\u5f0f<\/h3>\n\n\n\n
\u628a\u4e0a\u9762\u4e24\u6bb5\u62fc\u8d77\u6765\uff0cICV \u7684\u8986\u76d6\u957f\u5ea6\u662f\uff1a<\/p>\n\n\n\n
assoclen + cryptlen - authsize\n  = 8 + (skb->len - 8) - authsize\n  = skb->len - authsize<\/code><\/pre>\n\n\n\n
\u5bf9\u672c\u6587\u7684\u5e03\u5c40\uff0cskb->len = 40 + A<\/code>\uff08A = \u968f\u5305\u9644\u52a0\u7684 ICV \u5b57\u8282\u6570\uff09\uff0c\u6240\u4ee5\uff1a<\/p>\n\n\n\n
\n
ICV \u7684\u8986\u76d6\u8303\u56f4\u6052\u4e3a ESP\u5934 + IV + \u6587\u4ef6\u9875 = 40<\/code> \u5b57\u8282\uff0c\u8ddf authsize \u65e0\u5173\u3002<\/strong><\/p>\n<\/blockquote>\n\n\n\n
\u8fd9\u53e5\u8bdd\u7684\u4ef7\u503c\u5728\u4e8e\uff1a\u5b83\u628a”HMAC \u8be5\u8986\u76d6\u54ea 40 \u4e2a\u5b57\u8282”\u8fd9\u4ef6\u4e8b\u53d8\u6210\u786e\u5b9a\u7684<\/strong>\uff0c
\u4e8e\u662f\u6574\u6761\u94fe\u4e0a\u771f\u6b63\u672a\u77e5\u7684\u91cf\u53ea\u5269\u4e00\u4e2a\uff1a<\/p>\n\n\n\n
\n
\u968f\u5305\u9644\u52a0\u7684 ICV \u5b57\u8282\u6570 A\uff0c\u5fc5\u987b\u6070\u597d\u7b49\u4e8e\u5185\u6838 SA \u7684 authsize\u3002<\/strong><\/p>\n<\/blockquote>\n\n\n\n
0x02-4 IV \u600e\u4e48\u7b97<\/h3>\n\n\n\n
CBC \u89e3\u5bc6\u662f P = DEC(C) \u2295 IV<\/code>\u3002\u6211\u4eec\u5e0c\u671b\u89e3\u51fa\u6765\u7684\u660e\u6587\u5c31\u662f\u60f3\u8981\u7684\u65b0\u5185\u5bb9\uff0c\u4e8e\u662f\uff1a<\/p>\n\n\n\n
IV = AES_ECB_DEC(key, C_old) \u2295 C_new\n\n\u4ee3\u5165\uff1aP = DEC(C_old) \u2295 IV\n        = DEC(C_old) \u2295 DEC(C_old) \u2295 C_new\n        = C_new      \u2713<\/code><\/pre>\n\n\n\n
\u800c C_old<\/code> \u5c31\u662f\u76ee\u6807\u9875\u7684\u5f53\u524d\u5185\u5bb9\u2014\u2014pread()<\/code> \u8bfb\u51fa\u6765\uff0csplice()<\/code> \u9001\u51fa\u53bb\uff0c\u8bfb\u548c\u5199\u7528\u7684\u662f\u540c\u4e00\u9875\u3002<\/p>\n\n\n\n
\/* \u53ea\u5199 16 \u5b57\u8282\u6574\u6570\u500d\uff1a\u5bc6\u6587\u5757\u5fc5\u987b\u662f\u5b8c\u6574\u7684 CBC \u5757 *\/\nstatic void compute_iv(const uint8_t old_content[16],\n                       const uint8_t desired[16], uint8_t iv[16]) {\n    uint8_t dec[16];\n    aes256_ecb_decrypt(g_aes_key, old_content, dec);   \/* DEC(C_old) *\/\n    for (int i = 0; i < 16; i++)\n        iv[i] = dec[i] ^ desired[i];                   \/* \u518d\u5f02\u6216\u76ee\u6807\u5185\u5bb9 *\/\n}<\/code><\/pre>\n\n\n\n
0x02-5 trailer \u5224\u636e\uff1a\u628a\u5bc6\u7801\u5b66\u65ad\u8a00\u53d8\u6210\u80fd\u6570\u7684\u6574\u6570 \u2605<\/h3>\n\n\n\n
ESP \u89e3\u5bc6\u4e4b\u540e\u5185\u6838\u8981\u6821\u9a8c trailer\uff08padding \u957f\u5ea6 + next header\uff09\uff1a<\/p>\n\n\n\n
static inline int esp_remove_trailer(struct sk_buff *skb) {\n    alen = crypto_aead_authsize(aead);\n    hlen = sizeof(struct ip_esp_hdr) + crypto_aead_ivsize(aead);   \/* 24 *\/\n    elen = skb->len - hlen;\n\n    \/* \u4ece\"\u5bc6\u6587\u672b\u5c3e\u5f80\u524d\u6570 alen\uff0c\u518d\u5f80\u524d 2 \u5b57\u8282\"\u8bfb trailer \u2014\u2014\n       \u8fd9\u4e2a\u4f4d\u7f6e\u6070\u597d\u7b49\u4e8e\u3010\u89e3\u5bc6\u540e\u660e\u6587\u7684\u6700\u540e\u4e24\u5b57\u8282\u3011 *\/\n    skb_copy_bits(skb, skb->len - alen - 2, nexthdr, 2);\n\n    padlen = nexthdr[0];\n    if (padlen + 2 + alen >= elen)\n        return -EINVAL;          \/* \u8c03\u7528\u65b9\u4f1a\u628a\u5b83\u8ba1\u6210 XfrmInStateProtoError *\/\n    ...\n}<\/code><\/pre>\n\n\n\n
\u5212\u91cd\u70b9<\/strong>\uff1askb->len - alen - 2<\/code> \u6b63\u597d\u843d\u5728\u89e3\u5bc6\u540e\u660e\u6587\u7684\u6700\u540e\u4e24\u5b57\u8282\u3002<\/p>\n\n\n\n
\u4e8e\u662f\u6211\u4eec\u5f97\u5230\u4e00\u4e2a\u53ef\u8bc1\u4f2a\u7684\u63a8\u8bba\uff1a<\/p>\n\n\n\n
\n
\u5982\u679c\u62a5\u6587\u88ab\u6b63\u786e\u89e3\u5bc6\uff0c\u90a3\u4e48\u62a5\u9519\u4e0e\u5426\u5b8c\u5168\u7531\u6211\u4eec\u81ea\u5df1\u6784\u9020\u7684\u7b2c 15 \u5b57\u8282\u51b3\u5b9a<\/strong>\u3002
\u6362\u53e5\u8bdd\u8bf4\uff1a\/proc\/net\/xfrm_stat<\/code> \u91cc\u90a3\u4e2a\u8ba1\u6570\u5668\u5e94\u8be5\u589e\u52a0\u591a\u5c11\uff0c\u662f\u53ef\u4ee5\u7b97\u51fa\u6765<\/strong>\u7684\u3002<\/p>\n<\/blockquote>\n\n\n\n
\u8fd9\u5c31\u662f\u540e\u6587\u4e00\u5207\u7684\u652f\u70b9\u3002<\/p>\n\n\n\n
\n\n\n\n
0x03 \u600e\u4e48\u9a8c\u7684\uff1a\u4e94\u6761\u5224\u636e<\/h2>\n\n\n\n
0x03-1 \u5224\u636e\u4e00\uff1a\u4e00\u4e2a\u80fd\u7b97\u51fa\u6765\u7684\u6574\u6570\uff0831 \/ 62\uff09<\/h3>\n\n\n\n
\u6211\u4eec\u7684\u5199\u5165\u76ee\u6807\u662f \/apex\/com.android.runtime\/bin\/crash_dump64<\/code>\uff0c\u5f80\u5b83\u91cc\u9762\u5199\u4e00\u4e2a 1392 \u5b57\u8282\u7684
\u9759\u6001 helper\uff08\u7528\u6765\u8bfb vendor \u6587\u4ef6\uff09\uff0c\u4e5f\u5c31\u662f 87 \u4e2a 16 \u5b57\u8282\u5757<\/strong>\u3002\u52a0 6 \u4e2a\u63a2\u9488\u5305\uff0c\u4e00\u5171 93 \u4e2a\u5305<\/strong>\u3002<\/p>\n\n\n\n
\u6309 0x02-5 \u7684\u5224\u636e\uff1aalen = 16<\/code>\u3001elen = 32<\/code>\uff0c\u62a5\u9519\u6761\u4ef6\u662f padlen + 18 >= 32<\/code>\uff0c\u5373
desired[14] >= 14<\/code><\/strong>\u3002<\/p>\n\n\n\n
\u6570\u4e00\u904d splicehelper \u7684 87 \u4e2a\u5757\uff0c\u5176\u4e2d 25 \u4e2a<\/strong>\u6ee1\u8db3\u8fd9\u4e2a\u6761\u4ef6\uff08\u53e6\u6709 1 \u4e2a\u8865\u96f6\u5757\u5fc5\u7136\u901a\u8fc7\uff09\uff1a<\/p>\n\n\n\n
<\/th>\u9884\u6d4b<\/th>\u5b9e\u6d4b<\/th><\/tr><\/thead>
XfrmInStateProtoError<\/code> \u589e\u91cf<\/td>6 + 25 = 31<\/strong><\/td>31<\/strong><\/td><\/tr>
\u65e0\u58f0\u901a\u8fc7\uff08\u8ba4\u8bc1+\u89e3\u5bc6+trailer \u90fd\u8fc7\uff09<\/td>61 + 1 = 62<\/strong><\/td>62<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\u9010\u6570\u5b57\u543b\u5408\u3002<\/strong> \u8fd9\u8bf4\u660e\uff1a<\/p>\n\n\n\n
    \n
  • \u5185\u6838 SA \u7684 authsize \u5c31\u662f 16<\/strong>\uff08Android \u786e\u5b9e\u628a truncLen=128<\/code> \u4f20\u4e0b\u53bb\u4e86\uff09\uff1b<\/li>\n\n\n\n
  • \u6211\u4eec\u7684 HMAC \u8f93\u5165\u3001\u5bc6\u94a5\u3001IV \u6570\u5b66\u3001\u62a5\u6587\u5e03\u5c40\u5168\u90e8\u6b63\u786e<\/strong>\uff1b<\/li>\n\n\n\n
  • \u5305\u786e\u5b9e\u88ab\u5185\u6838\u89e3\u5bc6\u4e86<\/strong>\uff0c\u800c\u4e14\u89e3\u5bc6\u51fa\u7684\u660e\u6587\u5c31\u662f\u6211\u4eec\u7684 desired<\/code>\u2014\u2014\u56e0\u4e3a trailer \u5224\u636e
    \u6070\u597d\u547d\u4e2d\u4e86\u6211\u4eec\u6784\u9020\u7684\u56fe\u6848\u3002<\/li>\n<\/ul>\n\n\n\n
    \u53ef\u662f\u9875\u7f13\u5b58\u4e00\u4e2a\u5b57\u8282\u90fd\u6ca1\u53d8<\/strong>\uff1a\u76ee\u6807\u6587\u4ef6 md5 = 5f6d588628f5a69423d435419eae2191<\/code> \u524d\u540e\u4e00\u81f4\uff0c
    ELF \u5934\u4ecd\u662f e_type=3<\/code> \/ 14 \u4e2a program header \/ \u5e26 PT_INTERP<\/code>
    \uff08\u5982\u679c\u88ab\u5199\u8fdb\u53bb\uff0c\u8fd9\u91cc\u5df2\u7ecf\u53d8\u6210\u6211\u4eec\u90a3\u4e2a\u9759\u6001 helper \u4e86\uff09\u3002<\/p>\n\n\n\n
    \n
    \u8fd9\u4e00\u6761\u4e00\u6b21\u6027\u6392\u9664\u4e86\u6574\u6574\u4e00\u7c7b\u6000\u7591\uff1aICV \u957f\u5ea6\u731c\u9519\uff086 \u79cd\u5019\u9009\u5168\u8bd5\u8fc7 0\/12\/16\/20\/24\/32\uff09\u3001
    \u5bc6\u94a5\u4e0d\u5339\u914d\u3001\u7b97\u6cd5\u4e0d\u5bf9\u3001IV \u7b97\u9519\u3001\u5e03\u5c40\u5199\u9519\u3001SA \u6ca1\u5efa\u8d77\u6765\u3001\u5305\u6ca1\u5230\u5185\u6838\u3002
    \u5269\u4e0b\u7684\u552f\u4e00\u53ef\u80fd\uff1a\u89e3\u5bc6\u4f5c\u7528\u5728\u8f7d\u8377\u7684\u526f\u672c\u4e0a\uff0c\u9875\u7f13\u5b58\u9875\u538b\u6839\u6ca1\u8fdb skb\u3002<\/strong><\/p>\n<\/blockquote>\n\n\n\n
    0x03-2 \u5224\u636e\u4e8c\uff1a\u4e03\u5f62\u6001\u63a2\u9488\uff08\u4ee5\u53ca\u6211\u5dee\u70b9\u88ab\u9a97\u7684\u90a3\u4e2a\u5751\uff09<\/h3>\n\n\n\n
    \u6700\u5feb\u7684\u9a8c\u8bc1\u529e\u6cd5\u662f\u628a IPsec \u6574\u4e2a\u5265\u6389\uff0c\u53ea\u7528\u666e\u901a UDP socket \u6d4b\u540c\u4e00\u4ef6\u4e8b\uff1a<\/p>\n\n\n\n
    \n
    \u628a\u6e90\u9875\u53d1\u51fa\u53bb\u4e4b\u540e\u7acb\u523b\u539f\u5730\u6539\u5199\u8fd9\u4e00\u9875<\/strong>\uff0c\u7136\u540e\u624d\u6536\u5305\u3002
    \u6536\u5230\u65e7\u503c<\/strong> = \u53d1\u9001\u8def\u5f84\u505a\u4e86\u62f7\u8d1d\uff1b\u6536\u5230\u65b0\u503c<\/strong> = \u9875\u88ab\u5171\u4eab\u8fdb\u4e86 skb frag\u3002<\/p>\n<\/blockquote>\n\n\n\n
    \u4f46\u8fd9\u91cc\u6709\u4e2a\u5751\uff0c\u6211\u7b2c\u4e00\u7248\u5c31\u88ab\u5b83\u9a97\u4e86\uff1a\u63a2\u9488\u6587\u4ef6\u653e\u5728 \/data<\/code>\uff08Android \u7684 FBE \u52a0\u5bc6\u76d8\uff09\uff0c
    \u4e07\u4e00\u5185\u6838\u5728 splice()<\/code> \u8bfb\u8def\u5f84\u4e0a\u5c31\u62f7\u8d1d\u4e86\uff0c\u90a3”\u62f7\u8d1d”\u7684\u7ed3\u8bba\u5c31\u4e0d\u80fd\u7b97\u5728\u53d1\u9001\u8def\u5f84\u5934\u4e0a<\/strong>\u3002
    \u6240\u4ee5\u5148\u52a0\u4e00\u6761\u63a2\u9488\u6709\u6548\u6027\u6821\u9a8c<\/strong>\uff1a<\/p>\n\n\n\n
    \u5185\u6838: 6.1.145-android14-11-3254743-abS9280ZCS6DZH3\n\u6d4b\u8bd5\u76ee\u5f55: \/data\/local\/tmp        \u6587\u4ef6\u7cfb\u7edf: \/data(f2fs)\n* \u7ba1\u9053\u9875\u8eab\u4efd\u6821\u9a8c: \u7ba1\u9053\u5185\u662f\u65b0\u503c -> splice \u6302\u7684\u5c31\u662f\u9875\u7f13\u5b58\u9875<\/code><\/pre>\n\n\n\n
    splice(file\u2192pipe)<\/code> \u8d70 generic_file_splice_read<\/code>\uff0c\u4e0d\u7ecf GUP<\/strong>\uff0c\u7ba1\u9053\u7f13\u51b2\u76f4\u63a5\u5f15\u7528\u9875\u7f13\u5b58\u9875\uff0c
    \u6240\u4ee5\u6539\u6587\u4ef6\u5c31\u7b49\u4e8e\u6539\u7ba1\u9053\u91cc\u90a3\u4e00\u9875\u3002\u6821\u9a8c\u901a\u8fc7\uff0c\u540e\u9762\u624d\u80fd\u7b97\u6570\u3002\u7ed3\u679c\uff1a<\/p>\n\n\n\n
    \u5f62\u6001<\/th>\u7ed3\u679c<\/th><\/tr><\/thead>
    A splice(file 16B) \u2192 pipe \u2192 UDP<\/code><\/td>\u62f7\u8d1d<\/strong><\/td><\/tr>
    B splice(file \u6574\u9875 4096B) \u2192 pipe \u2192 UDP<\/code><\/td>\u62f7\u8d1d<\/strong><\/td><\/tr>
    C sendfile(UDP \u2190 file)<\/code><\/td>\u62f7\u8d1d<\/strong><\/td><\/tr>
    D mmap(RO) \u2192 vmsplice \u2192 pipe \u2192 UDP<\/code><\/td>\u62f7\u8d1d\uff08\u53d7 GUP \u7684 FOLL_WRITE<\/code>\u2192COW \u5e72\u6270\uff0c\u4ec5\u53c2\u8003\uff09<\/td><\/tr>
    E1 mmap(RO) + MSG_ZEROCOPY<\/code><\/td>\u62f7\u8d1d\uff08\u540c\u4e0a\uff09<\/td><\/tr>
    E2 \u4e09\u6bb5 ESP \u5f62\u6001 + MSG_ZEROCOPY<\/code><\/td>\u62f7\u8d1d\uff08\u540c\u4e0a\uff09<\/td><\/tr>
    F mmap(RW) + MSG_ZEROCOPY<\/code><\/strong><\/td>\u62f7\u8d1d<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
    F \u7ec4\u662f\u51b3\u5b9a\u6027\u7684\u90a3\u4e00\u683c<\/strong>\uff1a\u53ef\u5199 MAP_SHARED<\/code> \u6620\u5c04\u4e0b GUP \u4e0d\u53ef\u80fd\u89e6\u53d1 COW\uff0c
    \u5b83\u7167\u6837<\/strong>\u62f7\u8d1d \u2014\u2014 \u6240\u4ee5”\u62f7\u8d1d”\u662f\u53d1\u9001\u8def\u5f84\u81ea\u5df1\u7684\u884c\u4e3a\uff0c\u548c COW \u65e0\u5173\uff0c\u4e5f\u4e0d\u662f\u6587\u4ef6\u7cfb\u7edf\u7684\u9505\u3002<\/p>\n\n\n\n
    0x03-3 \u5224\u636e\u4e09\uff1a\u53cd\u6c47\u7f16\u8bbe\u5907\u81ea\u5df1\u7684\u5185\u6838<\/h3>\n\n\n\n
    \u5bf9\u7740\u673a\u578b\u56fa\u4ef6\u62bd\u51fa\u6765\u7684 vmlinux_dzh3.elf<\/code> \u770b\uff1a<\/p>\n\n\n\n
    \u76ee\u6807<\/th>\u770b\u5230\u4ec0\u4e48<\/th>\u542b\u4e49<\/th><\/tr><\/thead>
    udp_sendpage<\/code><\/td>\u8c03\u7528 iov_iter_bvec<\/code> + udp_sendmsg<\/code><\/td>\u662f\u65b0\u5199\u6cd5\uff0c\u4e0d\u662f\u8001\u5f0f ip_append_page<\/code><\/td><\/tr>
    __ip_append_data<\/code><\/td>\u65e0\u4efb\u4f55 MSG_SPLICE_PAGES<\/code>\uff08BIT 27\uff09\u5224\u5b9a\uff1b0 \u6b21<\/strong>\u8c03\u7528 skb_append_pagefrags<\/code>\uff1b\u5206\u7247\u8d70 sk_alloc_send_pskb<\/code> + sk_page_frag_refill<\/code><\/td>\u5b83\u53ea\u4f1a\u81ea\u5df1\u5206\u914d frag \u9875\u518d\u62f7\u8fdb\u53bb<\/strong>\uff0c\u4ece\u4e0d\u628a”\u6765\u6e90\u9875”\u6302\u4e0a\u53bb<\/td><\/tr>
    esp_input<\/code><\/td>\u5168\u6587\u53ea\u6709 skb_cloned()<\/code> \u7684\u4e24\u4e2a\u5224\u5b9a\uff0c\u6ca1\u6709\u4efb\u4f55 skb_shinfo->flags<\/code> \u4f4d\u6d4b\u8bd5<\/strong><\/td>\u4fee\u590d\u7248\u5e94\u6709\u7684 tbnz w?, #0x1<\/code> \u4e0d\u5b58\u5728 \u21d2 \u672a\u4fee\u8865<\/strong><\/td><\/tr>
    ip_append_page<\/code><\/td>\u5168\u6587 0 \u5904 SKBFL_SHARED_FRAG<\/code> \u5199\u5165<\/td>6.1 \u5206\u652f\u7684\u4fee\u590d\u70b9\u4e5f\u662f\u7a7a\u7684\uff0c\u800c\u4e14\u8fd9\u4e2a\u51fd\u6570\u5728 6.1 \u7684 UDP \u8def\u5f84\u4e0a\u5df2\u7ecf\u662f\u6b7b\u4ee3\u7801<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
    “\u672a\u4fee\u8865”\u8fd9\u4e2a\u7ed3\u8bba\u5f88\u91cd\u8981<\/strong>\uff1a\u5b83\u628a”\u6f0f\u6d1e\u5df2\u7ecf\u88ab\u5382\u5546\u4fee\u6389\u4e86”\u8fd9\u4e2a\u89e3\u91ca\u4e5f\u6392\u9664\u4e86\uff0c
    \u628a\u7ed3\u8bba\u552f\u4e00\u5730\u9489\u5728”\u9875\u7f13\u5b58\u9875\u4ece\u6765\u6ca1\u8fdb\u8fc7 skb<\/strong>“\u4e0a\u3002<\/p>\n\n\n\n
    0x03-4 \u5224\u636e\u56db\uff1a\u5185\u6838\u914d\u7f6e\uff08\u8bbe\u5907\u81ea\u62a5\uff09<\/h3>\n\n\n\n
    # Linux\/arm64 6.1.145 Kernel Configuration      \u2190 7694 \u884c\u5b8c\u6574 config\n# CONFIG_AF_RXRPC is not set                   \u2190 CVE-2026-43500 \u8fd9\u6761\u5907\u9009\u8def\u6ca1\u6709\n# CONFIG_CRYPTO_USER is not set\n# CONFIG_CRYPTO_USER_API_AEAD is not set       \u2190 Copy Fail(AF_ALG) \u90a3\u6761\u8def\u4e5f\u6ca1\u6709\n# CONFIG_USER_NS is not set                    \u2190 \u539f PoC \u9760 userns \u81ea\u5efa SA \u4e5f\u6ca1\u95e8\nCONFIG_NET_NS=y<\/code><\/pre>\n\n\n\n
    \u65c1\u8bc1\uff1anm vmlinux_dzh3.elf | grep -icE 'af_alg|algif|rxrpc'<\/code> = 0\uff1b
    \/vendor\/lib\/modules<\/code>\uff08357 \u4e2a\u6a21\u5757\uff09\u91cc\u6ca1\u6709 af_alg.ko<\/code> \/ algif_aead.ko<\/code>\uff1b
    \u771f\u673a socket(AF_ALG, SOCK_SEQPACKET, 0)<\/code> \u2192 EACCES<\/code>\uff08SELinux \u5728\u5bb6\u65cf\u67e5\u627e\u4e4b\u524d\u5c31\u62e6\uff09\uff0c
    unshare(CLONE_NEWUSER)<\/code> \u2192 EINVAL<\/code>\u3002<\/p>\n\n\n\n
    0x03-5 \u5224\u636e\u4e94\uff1astable 6.1.y \u7684\u5206\u754c\u7ebf<\/h3>\n\n\n\n
    \u628a net\/ipv4\/udp.c<\/code> \u7684 udp_sendpage()<\/code> \u9010\u7248\u672c\u7ffb\u51fa\u6765\uff1a<\/p>\n\n\n\n
    5.15.204  udp_sendpage \u2192 ip_append_page                  \u2705 \u5171\u4eab\uff08S23 \u53ef\u7528\uff09\n6.1.25    udp_sendpage \u2192 ip_append_page                  \u2705 \u5171\u4eab\n6.1.50    udp_sendpage \u2192 ip_append_page                  \u2705 \u5171\u4eab\n6.1.75    iov_iter_bvec + MSG_SPLICE_PAGES               \u274c \u62f7\u8d1d   \u2190 \u65ad\u70b9\u5728\u8fd9\u91cc\n6.1.100   \u540c\u4e0a                                            \u274c\n6.1.128\uff08CZB2\uff09                                           \u274c\n6.1.145\uff08DZH3\uff09                                           \u274c\n6.6.98    \u6ca1\u6709 udp_sendpage\uff0c\u8d70 splice_to_socket          \u2705 \u5171\u4eab<\/code><\/pre>\n\n\n\n
    \u518d\u628a\u672c\u673a\u6240\u6709\u673a\u578b\u5185\u6838\u955c\u50cf\u666e\u67e5\u4e00\u904d\uff08\u53d6 udp_sendpage<\/code> \u7684 callee\uff09\uff1a<\/p>\n\n\n\n
    \u955c\u50cf<\/th>callee<\/th>\u7ed3\u8bba<\/th><\/tr><\/thead>
    vmlinux_pixel6<\/code><\/td>ip_append_page<\/code><\/td>\u2705 \u8001\u5185\u6838<\/td><\/tr>
    CZB2<\/code>\/dzf2<\/code>\/dzh3<\/code>\/cza1<\/code>\/cza1_chc<\/code>\/dze2<\/code>\/dzg1<\/code>\/byh7<\/code><\/td>iov_iter_bvec<\/code> + udp_sendmsg<\/code><\/td>\u274c \u5168\u662f\u62f7\u8d1d<\/td><\/tr>
    vmlinux_czg1<\/code>\uff08S25 \/ 6.6\uff09<\/td>\u6ca1\u6709\u8fd9\u4e2a\u51fd\u6570<\/td>\u2705<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
    \n\n\n\n
    0x04 \u6839\u56e0\uff1a\u4e00\u6b21”\u534a\u622a\u56de\u79fb”<\/h2>\n\n\n\n
    \u7ed3\u8bba\u4e00\u53e5\u8bdd\uff1a<\/p>\n\n\n\n
    \n
    stable 6.1.y \u628a udp_sendpage()<\/code> \u56de\u79fb\u6210\u4e86\u65b0\u5199\u6cd5\uff08\u6784\u9020 bvec \u8fed\u4ee3\u5668\u5e76\u7f6e MSG_SPLICE_PAGES<\/code>\uff09\uff0c
    \u4f46\u540c\u4e00\u5206\u652f\u7684 __ip_append_data()<\/code> \u6ca1\u6709\u540c\u6b65\u83b7\u5f97\u5bf9 MSG_SPLICE_PAGES<\/code> \u7684\u5904\u7406<\/strong>\u3002
    \u4e8e\u662f\u8fd9\u4e2a\u6807\u5fd7\u88ab\u9759\u9ed8\u5ffd\u7565\uff0c\u6570\u636e\u88ab copy_from_iter<\/code> \u62f7\u8fdb\u5185\u6838\u81ea\u5df1\u5206\u914d\u7684 frag \u9875\u2014\u2014
    \u9875\u7f13\u5b58\u9875\u4ece\u672a\u8fdb\u5165 skb\uff0c\u5c31\u5730\u89e3\u5bc6\u81ea\u7136\u5199\u4e0d\u5230\u76ee\u6807\u6587\u4ef6\u3002<\/strong><\/p>\n<\/blockquote>\n\n\n\n
    “\u628a\u6765\u6e90\u9875\u539f\u6837\u6302\u8fdb skb”\u8fd9\u4e2a\u80fd\u529b\u662f Linux 6.5<\/strong> \u624d\u5f15\u5165\u7684\u8bed\u4e49\uff087da0dde68486<\/code>\uff09\u3002
    5.10\/5.15 \u7528\u7684\u662f\u8001\u5f0f ip_append_page()<\/code>\uff08\u5b83\u4f1a\u76f4\u63a5\u6302\u9875\uff0c\u6240\u4ee5 S23 \u80fd\u8dd1\uff09\uff1b
    6.5\/6.6 \u8d77\u65b0\u8def\u5f84\u5b8c\u6574\uff08\u6240\u4ee5 S25 \u80fd\u8dd1\uff09\uff1b
    6.1.75~6.1.14x \u8fd9\u4e00\u5c0f\u6bb5\uff0c\u6070\u597d\u5361\u5728”\u65b0\u5199\u6cd5\u5df2\u7ecf\u8fdb\u6765\u3001\u5e95\u5c42\u80fd\u529b\u8fd8\u6ca1\u6765”\u7684\u88c2\u7f1d\u91cc\u3002<\/strong><\/p>\n\n\n\n
    \u8fd9\u4ef6\u4e8b\u5728 Linux \u5185\u6838\u90ae\u4ef6\u5217\u8868\u4e0a\u6709\u72ec\u7acb\u4f50\u8bc1\u3002\u5728 CVE-2026-43284 \u7684\u4fee\u590d\u8ba8\u8bba\u91cc\uff0c\u5185\u6838\u5f00\u53d1\u8005\u5199\u9053\uff1a<\/p>\n\n\n\n
    \n
    “I don’t see the support for MSG_SPLICE_PAGES present in kernels 6.1 and older
    (i.e. 7da0dde68486 (“ip, udp: Support MSG_SPLICE_PAGES”) is not there in 6.1.y and older
    stable branches). Are you sure the PoC didn’t fall back to the RxRPC Page-Cache Write
    vulnerability in your case?<\/strong>“<\/p>\n<\/blockquote>\n\n\n\n
    \u66f4\u5999\u7684\u662f\uff1a6.1 \u5206\u652f\u7684\u5b98\u65b9\u4fee\u590d\uff08f4c50a4034e6<\/code>\uff09\u88ab\u6253\u5728 ip_append_page()<\/code><\/strong> \u4e0a\u2014\u2014
    \u800c\u90a3\u6b63\u662f 6.1 \u4e0a\u5df2\u7ecf\u4e0d\u53ef\u8fbe<\/strong>\u7684\u51fd\u6570\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c6.1 \u7684”\u4fee\u590d”\u6253\u5728\u4e86\u4e00\u6761\u6b7b\u8def\u5f84\u4e0a<\/strong>\uff0c
    \u771f\u6b63\u51b3\u5b9a\u53ef\u8fbe\u6027\u7684\u90a3\u6761\u8def\u5f84\uff08\u65b0\u5f0f udp_sendpage<\/code>\uff09\u6839\u672c\u6ca1\u6709\u5bf9\u5e94\u7684\u5171\u4eab\u80fd\u529b\u3002<\/p>\n\n\n\n
    \n\n\n\n
    0x05 \u90a3\u80fd\u4e0d\u80fd\u81ea\u5df1\u6539\u4e00\u4e0b\u5229\u7528\uff1f<\/h2>\n\n\n\n
    \u8fd9\u662f\u6211\u88ab\u95ee\u5f97\u6700\u591a\u7684\u95ee\u9898\uff0c\u503c\u5f97\u9010\u5c42\u56de\u7b54\u3002<\/p>\n\n\n\n
    \u5c42<\/th>\u73b0\u72b6<\/th>\u80fd\u6539\u5417<\/th><\/tr><\/thead>
    \u62a5\u6587\u5c42<\/td>authsize=16\u3001HMAC \u8986\u76d6 40 \u5b57\u8282\u3001IV \u6784\u9020\u5168\u90e8\u9a8c\u8bc1\u6b63\u786e\uff080x03-1\uff09<\/td>\u6539\u4e0d\u51fa\u66f4\u597d\u7684<\/td><\/tr>
    \u53d1\u9001\u5c42<\/td>splice<\/code> \/ sendfile<\/code> \/ vmsplice<\/code> \/ MSG_ZEROCOPY<\/code>\uff08\u53ea\u8bfb\u4e0e\u53ef\u5199\u6620\u5c04\uff09\u5168\u62f7\u8d1d<\/strong>\uff1braw \/ AF_PACKET \u4e4b\u7c7b\u6700\u7ec8\u90fd\u6c47\u8fdb\u540c\u4e00\u4e2a ip_append_data<\/code><\/td>\u5426<\/td><\/tr>
    \u5185\u6838\u5c42<\/td>\u9700\u8981 __ip_append_data<\/code> \u8ba4\u8bc6 MSG_SPLICE_PAGES<\/code>\uff086.5 \u8bed\u4e49\uff09<\/td>\u7528\u6237\u6001\u65e0\u6cd5\u8865<\/strong><\/td><\/tr>
    \u76ee\u6807\u5c42<\/td>\u6362\u76ee\u6807\u6587\u4ef6\u6ca1\u7528\uff08\u4e0d\u662f\u6743\u9650\u6216\u6587\u4ef6\u7cfb\u7edf\u95ee\u9898\uff0c0x03-2 \u5df2\u8bc1\uff09<\/td>\u5426<\/td><\/tr>
    \u65c1\u8def\u5c42<\/td>RxRPC \u672a\u7f16\u3001AF_ALG \u672a\u7f16\u3001user namespace \u672a\u5f00<\/td>\u5426<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
    \u4e00\u53e5\u8bdd\uff1a\u7f3a\u7684\u90a3\u4e00\u73af\u5728\u5185\u6838\u91cc\uff0c\u7528\u6237\u6001\u65e0\u8bba\u600e\u4e48\u6539\u62a5\u6587\u3001\u6362\u53d1\u9001 API\u3001\u6362\u76ee\u6807\u6587\u4ef6\u90fd\u7ed5\u4e0d\u8fc7\u53bb\u3002<\/strong><\/p>\n\n\n\n
    0x05-1 \u88ab\u6392\u9664\u7684\u66ff\u4ee3\u89e3\u91ca\uff08\u6c47\u603b\u8868\uff09<\/h3>\n\n\n\n
    \u6392\u67e5\u4e00\u4e2a”\u5e94\u8be5\u80fd\u8dd1\u5374\u8dd1\u4e0d\u4e86”\u7684\u95ee\u9898\uff0c\u6700\u6015\u7684\u662f\u81ea\u5df1\u9a97\u81ea\u5df1\u3002\u8fd9\u662f\u6211\u9010\u6761\u6253\u6389\u7684\u6e05\u5355\uff1a<\/p>\n\n\n\n
    \u66ff\u4ee3\u89e3\u91ca<\/th>\u600e\u4e48\u9a8c\u7684<\/th>\u7ed3\u679c<\/th><\/tr><\/thead>
    ICV \/ authsize \u731c\u9519<\/td>trailer \u5224\u636e\u7684\u53ef\u8bc1\u4f2a\u9884\u6d4b<\/td>\u2717 \u9884\u6d4b 31 = \u5b9e\u6d4b 31<\/td><\/tr>
    \u5bc6\u94a5 \/ \u7b97\u6cd5\u4e0d\u5339\u914d<\/td>\u540c\u4e0a\uff08HMAC \u8fc7\u4e86\u624d\u53ef\u80fd\u89e3\u5bc6\u3001\u624d\u4f1a\u89e6\u53d1 trailer \u5224\u636e\uff09<\/td>\u2717<\/td><\/tr>
    IV \u6570\u5b66\u5199\u9519<\/td>\u540c\u4e0a\uff08\u89e3\u51fa\u6765\u7684\u5fc5\u987b\u662f\u6211\u4eec\u7684 desired<\/code>\uff09<\/td>\u2717<\/td><\/tr>
    SA \u6ca1\u5efa\u8d77\u6765 \/ \u5305\u6ca1\u5230\u5185\u6838<\/td>XfrmIn*<\/code> \u8ba1\u6570\u5668<\/td>\u2717 \u53ea\u6709 ProtoError<\/code> \u5728\u6da8\uff0cSA \u547d\u4e2d<\/td><\/tr>
    \u5185\u6838\u5df2\u6253\u4fee\u590d<\/td>\u53cd\u6c47\u7f16 esp_input<\/code> \/ ip_append_page<\/code><\/td>\u2717 \u672a\u4fee\u8865<\/td><\/tr>
    \u6587\u4ef6\u7cfb\u7edf\u4e0d\u8ba9 splice<\/code> \u6302\u9875\uff08EROFS \/ FBE\uff09<\/td>\u7ba1\u9053\u9875\u8eab\u4efd\u6821\u9a8c<\/td>\u2717 \u7ba1\u9053\u91cc\u5c31\u662f\u9875\u7f13\u5b58\u9875<\/td><\/tr>
    zerocopy \u88ab FOLL_WRITE<\/code> \u7684 COW \u6253\u65ad<\/td>F \u7ec4\uff1a\u53ef\u5199\u6620\u5c04<\/td>\u2717 \u7167\u6837\u62f7\u8d1d<\/td><\/tr>
    \u539f PoC \u7684 userns \u8def\u5f84<\/td>unshare(CLONE_NEWUSER)<\/code><\/td>\u2717 EINVAL<\/code><\/td><\/tr>
    RxRPC \u5907\u9009\u8def<\/td>CONFIG_AF_RXRPC<\/code> + \u7b26\u53f7<\/td>\u2717 \u672a\u7f16\u8bd1<\/td><\/tr>
    AF_ALG\uff08Copy Fail\uff09\u5907\u9009\u8def<\/td>CONFIG_CRYPTO_USER_API_AEAD<\/code> + \u771f\u673a socket()<\/code><\/td>\u2717 \u672a\u7f16\u8bd1\u4e14 SELinux \u62e6<\/td><\/tr>
    6.1 \u7684 UDP \u62fc\u63a5\u8def\u5f84\u4e0d\u505a\u9875\u5171\u4eab<\/strong><\/td>\u4e03\u5f62\u6001\u77e9\u9635<\/strong><\/td>\u2705 \u6210\u7acb<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
    \n\n\n\n
    0x06 \u526f\u4ea7\u54c1\u4e0e\u51e0\u4e2a\u6559\u8bad<\/h2>\n\n\n\n
    \u8fd9\u6b21\u6392\u67e5\u672c\u8eab\u4e5f\u4ea7\u51fa\u4e86\u4e00\u4e9b\u80fd\u590d\u7528\u7684\u4e1c\u897f\uff0c\u987a\u4fbf\u8bb0\u51e0\u4e2a\u6559\u8bad\u3002<\/p>\n\n\n\n
    0x06-1 \u4e00\u4e2a\u81ea\u7814\u7684”\u80fd\u4e0d\u80fd\u7528”\u63a2\u9488<\/h3>\n\n\n\n
    \u4ee5\u540e\u9047\u5230\u4efb\u4f55\u673a\u578b\u3001\u4efb\u4f55\u5185\u6838\uff0c\u90fd\u53ef\u4ee5\u51e0\u767e\u6beb\u79d2\u5185\u56de\u7b54”DirtyFrag \u8fd9\u7c7b\u9875\u7f13\u5b58\u5199\u539f\u8bed\u53ef\u4e0d\u53ef\u8fbe”\u3002
    \u5b83\u662f\u81ea\u7814\u7684\uff08\u4e0d\u4f9d\u8d56 app\u3001\u4e0d\u4f9d\u8d56 IPsec\uff09\uff0cNDK \u4e00\u6761\u547d\u4ee4\u7f16\u8bd1\u6210\u9759\u6001\u4e8c\u8fdb\u5236\uff0cadb push<\/code> \u5c31\u80fd\u8dd1\uff1a<\/p>\n\n\n\n
    \/* \u6838\u5fc3\u5224\u636e\uff1a\u628a\u6e90\u9875\u53d1\u51fa\u53bb\u4e4b\u540e**\u7acb\u523b\u539f\u5730\u6539\u5199\u8fd9\u4e00\u9875**\uff0c\u518d\u6536\u5305\u770b\u65b0\u503c\u8fd8\u662f\u65e7\u503c\u3002\n   \u65e7\u503c = \u53d1\u9001\u8def\u5f84\u62f7\u8d1d\uff08\u4e0d\u53ef\u8fbe\uff09\uff1b\u65b0\u503c = \u9875\u88ab\u5171\u4eab\u8fdb skb frag\uff08\u53ef\u8fbe\uff09\u3002 *\/\nstatic int try_send(int kind, int fd, const char *path, int sfd, int rfd) {\n    ...\n    if (kind == 0) {                       \/* A: splice(file->pipe) -> UDP *\/\n        pipe(pfd);\n        ffd = open(path, O_RDONLY);\n        off_t off = 0;\n        \/* \u7b2c\u4e00\u6b65\uff1a\u628a\u6587\u4ef6\u9875\u6302\u8fdb\u7ba1\u9053\uff08\u8fd9\u4e00\u6b65\u4e0d\u7ecf GUP\uff0c\u7ba1\u9053\u91cc\u5c31\u662f\u9875\u7f13\u5b58\u9875\uff09 *\/\n        if (splice(ffd, &off, pfd[1], NULL, 16, SPLICE_F_MOVE) == 16)\n            \/* \u7b2c\u4e8c\u6b65\uff1a\u7ba1\u9053 -> UDP socket\u3002\u80fd\u4e0d\u80fd\"\u539f\u6837\u6302\u8fdb skb\"\u5168\u770b\u8fd9\u4e00\u6b65 *\/\n            sent = splice(pfd[0], NULL, sfd, NULL, 16, 0);\n    }\n    if (sent > 0) {\n        pwrite(fd, pageB, 16, 0);          \/* \u5173\u952e\u65f6\u5e8f\uff1a\u5148\u6539\u6e90\u9875\uff0c\u518d\u6536\u5305 *\/\n        ...\n    }\n}<\/code><\/pre>\n\n\n\n
    # \u7f16\u8bd1 + \u63a8\u9001 + \u8fd0\u884c\uff08\u5efa\u8bae\u540c\u65f6\u8dd1 \/dev \u4e0e \/data\uff0c\u4e24\u8fb9\u5bf9\u6bd4\u6392\u9664\u52a0\u5bc6\u76d8\u5e72\u6270\uff09\n$CC -O2 -static -Wall -o psp psp.c\nadb push psp \/data\/local\/tmp\/ && adb shell chmod 755 \/data\/local\/tmp\/psp\nadb shell \/data\/local\/tmp\/psp \/data\/local\/tmp<\/code><\/pre>\n\n\n\n
    \u8f93\u51fa\u76f4\u63a5\u7ed9\u7ed3\u8bba\uff0c\u9644\u5e26”\u7ba1\u9053\u9875\u8eab\u4efd\u6821\u9a8c”\u4f5c\u4e3a\u6709\u6548\u6027\u80cc\u4e66\uff1a<\/p>\n\n\n\n
    * \u7ba1\u9053\u9875\u8eab\u4efd\u6821\u9a8c: \u7ba1\u9053\u5185\u662f\u65b0\u503c -> splice \u6302\u7684\u5c31\u662f\u9875\u7f13\u5b58\u9875\n  A splice(file 16B)->pipe->UDP            \u3010\u62f7\u8d1d\u3011\u6536\u5230\u65e7\u503c\n  ...\n  F  mmap(RW)+MSG_ZEROCOPY                 \u3010\u62f7\u8d1d\u3011\u6536\u5230\u65e7\u503c<\/code><\/pre>\n\n\n\n
    0x06-2 “\u53d1\u5305\u6210\u529f”\u4e0d\u7b49\u4e8e”\u5199\u8fdb\u53bb\u4e86”<\/h3>\n\n\n\n
    \u8fd9\u53ef\u80fd\u662f\u672c\u6b21\u6700\u6709\u4ef7\u503c\u7684\u4e00\u6761\u5de5\u7a0b\u6559\u8bad\u3002<\/p>\n\n\n\n
    \u539f\u5b9e\u73b0\uff08\u4ee5\u53ca\u6211\u7b2c\u4e00\u7248\uff09\u5728\u5199\u5165\u540e\u6253\u5370 “\u5df2\u5199\u5165 N \u5b57\u8282\u5230 xxx”<\/strong>\uff0c
    \u4f46\u90a3\u53e5\u8bdd\u7684\u771f\u5b9e\u542b\u4e49\u53ea\u662f “UDP \u5305\u53d1\u51fa\u53bb\u4e86”<\/strong> \u2014\u2014 \u5185\u6838\u5b8c\u5168\u53ef\u80fd\u56e0\u4e3a\u8ba4\u8bc1\u4e0d\u8fc7\u3001
    \u6216\u8005\u56e0\u4e3a\u9875\u538b\u6839\u6ca1\u8fdb skb\uff0c\u628a\u5305\u4e22\u6389\uff0c\u800c\u7528\u6237\u770b\u5230\u7684\u662f\u4e00\u884c”\u6210\u529f”\u3002<\/p>\n\n\n\n
    \u6240\u4ee5\u6211\u7ed9\u5b83\u52a0\u4e86\u56de\u8bfb\u6821\u9a8c<\/strong>\uff1a\u6bcf\u5199\u4e00\u4e2a 16 \u5b57\u8282\u5757\uff0c\u5c31 pread()<\/code> \u56de\u6765\u6bd4\u5bf9\u3002<\/p>\n\n\n\n
    \u56de\u8bfb\u4e0d\u7b26 @0x10: \u671f\u671b 0200b700... \u5b9e\u9645 0300b700...\n\u56de\u8bfb\u6821\u9a8c: \u901a\u8fc7 5 \u5757 \/ \u5931\u8d25 82 \u5757<\/code><\/pre>\n\n\n\n
    \uff08\u90a3”\u901a\u8fc7 5 \u5757”\u5176\u5b9e\u8fd8\u662f\u5de7\u5408\u2014\u2014splicehelper \u91cc\u6709\u51e0\u5757\u672c\u6765\u5c31\u662f\u5168\u96f6\uff0c\u8ddf\u539f\u5185\u5bb9\u6b63\u597d\u4e00\u81f4\u3002\uff09
    \u6ca1\u6709\u8fd9\u4e2a\u56de\u8bfb\uff0c\u8fd9\u6b21\u6392\u67e5\u4f1a\u7ed5\u8fdc\u5f97\u591a\u3002<\/strong><\/p>\n\n\n\n
    0x06-3 \u5173\u4e8e”\u770b\u770b\u5b89\u5168\u8865\u4e01\u7ea7\u522b”\u90a3\u6761\u5224\u636e<\/h3>\n\n\n\n
    \u53c2\u8003\u5b9e\u73b0\u7684\u4e2d\u6587\u6392\u969c\u6307\u5f15\u91cc\u5199\uff1a<\/p>\n\n\n\n
    \n
    \u4e0a\u6e38\u4fee\u590d\u63d0\u4ea4\u662f f4c50a4034e6<\/code>\uff082026-05-08\uff09\u3002\u5982\u679c\u624b\u673a\u7684\u5b89\u5168\u8865\u4e01\u7ea7\u522b\u5df2\u7ecf\u5305\u542b\u8be5\u4fee\u590d\uff0c
    \u672c\u5de5\u5177\u4f1a\u5931\u8d25\u2014\u2014\u8fd9\u4e0d\u662f bug\uff0c\u662f\u6f0f\u6d1e\u6ca1\u4e86\u3002<\/strong>
    \u2026\u2026 \u8d70\u5230\u4e00\u534a\u5931\u8d25\uff0c\u63d0\u793a\u8865\u4e01 #1 \/ #2 \u5931\u8d25\uff1f<\/strong> \u5927\u6982\u7387\u662f\u5185\u6838\u91cc\u7684 DirtyFrag \u6f0f\u6d1e\u5df2\u7ecf\u88ab\u4fee\u590d\u4e86\u3002<\/p>\n<\/blockquote>\n\n\n\n
    \u672c\u673a\u5b89\u5168\u8865\u4e01\u7ea7\u522b\u662f 2026-08-05<\/strong>\uff08\u665a\u4e8e 2026-05\uff09\uff0c\u800c\u5b9e\u6d4b\u5931\u8d25\u70b9\u6b63\u662f\u8865\u4e01 #1<\/strong> \u2014\u2014
    \u4ece\u73b0\u8c61\u770b\u5b8c\u5168\u5bf9\u5f97\u4e0a\u3002\u4f46\u5fc5\u987b\u8bf4\u6e05\u695a\uff1a\u8fd9\u6761\u5224\u636e\u5728\u672c\u673a\u53ea\u662f”\u78b0\u5de7\u7ed9\u4e86\u5bf9\u7684\u7ed3\u8bba”\u3002<\/strong><\/p>\n\n\n\n
    \u53cd\u6c47\u7f16\u8bc1\u636e\u663e\u793a\u672c\u673a\u5185\u6838\u5e76\u672a\u5305\u542b<\/strong>\u8be5\u4fee\u590d\uff08esp_input<\/code> \u91cc\u6ca1\u6709 shared-frag \u5224\u5b9a\u3001
    ip_append_page<\/code> \u91cc\u6ca1\u6709\u6807\u5fd7\u5199\u5165\uff09\u3002\u771f\u6b63\u7684\u539f\u56e0\u662f 0x04 \u8bf4\u7684\u90a3\u4ef6\u4e8b\uff1a
    \u9875\u7f13\u5b58\u9875\u538b\u6839\u6ca1\u8fdb skb\uff0c\u5171\u4eab frag \u6839\u672c\u4e0d\u5b58\u5728\u2014\u2014\u8c08\u4e0d\u4e0a”\u88ab\u4fee\u590d\u7684\u68c0\u67e5\u62e6\u4e0b”\u3002<\/strong><\/p>\n\n\n\n
    \u6240\u4ee5\u66f4\u51c6\u786e\u7684\u8868\u8ff0\u662f\uff1a<\/p>\n\n\n\n
    \n
    S24 \u4e0a\u5931\u8d25\u4e0d\u662f”\u6f0f\u6d1e\u88ab\u4fee\u4e86”\uff0c\u800c\u662f\u8fd9\u6761\u6f0f\u6d1e\u7684\u8f93\u5165\u7aef\u5728\u8be5\u5185\u6838\u4e0a\u4e0d\u53ef\u8fbe<\/strong>\u3002
    \u5b89\u5168\u8865\u4e01\u7ea7\u522b\u662f\u7ecf\u9a8c\u5224\u636e\uff0c\u4e0d\u662f\u56e0\u679c\u89e3\u91ca\u3002<\/p>\n<\/blockquote>\n\n\n\n
    0x06-4 \u4e00\u4e2a\u6709\u8da3\u7684\u63a8\u8bba\uff1aS24 \u51fa\u5382\u56fa\u4ef6\u66fe\u7ecf\u80fd\u7528<\/h3>\n\n\n\n
    \u7531 0x03-5 \u7684\u5206\u754c\u7ebf\u53ef\u4ee5\u63a8\uff1aS24 \u7cfb\u5217\u51fa\u5382\u56fa\u4ef6<\/strong>\uff082024 \u5e74\u521d\uff0c\u7ea6 6.1.25~6.1.50\uff09\u7684\u5185\u6838\uff0c
    udp_sendpage()<\/code> \u8fd8\u662f\u8001\u5f0f\u5b9e\u73b0\uff0c\u7406\u8bba\u4e0a\u5f53\u65f6\u662f\u53ef\u8fbe\u7684<\/strong>\u30022024 \u5e74\u4e2d\u628a sendpage-removal \u7cfb\u5217
    \u56de\u79fb\u8fdb 6.1.y \u4e4b\u540e\uff0c\u8fd9\u6761\u5171\u4eab\u8def\u5f84\u5c31\u65ad\u4e86\u2014\u2014\u5c5e\u4e8e\u56de\u79fb\u7684\u526f\u4f5c\u7528\uff0c\u4e0d\u662f\u6709\u610f\u4fee\u6d1e\u3002<\/p>\n\n\n\n
    \u8fd9\u4e5f\u89e3\u91ca\u4e86\u53c2\u8003\u5b9e\u73b0\u4e3a\u4ec0\u4e48\u540c\u65f6\u643a\u5e26 android12-5.10<\/code> \/ android13-5.15<\/code> \u4e0e
    android15-6.6<\/code> \/ android16-6.12<\/code> \/ android17-6.18<\/code> \u4e24\u5934\u7684\u6a21\u5757\uff1a
    \u5b83\u652f\u6301\u7684\u662f\u4e00\u5934\u4e00\u5c3e\u4e24\u7c7b\u5185\u6838\uff0c\u800c 6.1 \u6070\u597d\u5939\u5728\u88c2\u7f1d\u91cc\u3002<\/strong><\/p>\n\n\n\n
    \n\n\n\n
    0x07 \u673a\u578b\u5bf9\u7167 & \u7ed3\u8bed<\/h2>\n\n\n\n
    \u5185\u6838<\/th>udp_sendpage<\/code><\/th>DirtyFrag ESP \u539f\u8bed<\/th>\u673a\u578b\u4e3e\u4f8b<\/th><\/tr><\/thead>
    5.10 \/ 5.15<\/td>ip_append_page<\/code><\/td>\u2705 \u53ef\u8fbe<\/td>S23 \u7cfb\u5217\uff08\u673a\u4e3b\u5b9e\u6d4b\uff09<\/td><\/tr>
    6.1.25 ~ 6.1.50<\/td>ip_append_page<\/code><\/td>\u2705 \u53ef\u8fbe\uff08\u4ee3\u7801\u5c42\u5df2\u6838\u5b9e\uff1b\u51fa\u5382\u56fa\u4ef6\u662f\u5426\u843d\u5728\u8be5\u533a\u95f4\u672a\u9010\u4e00\u9a8c\u8bc1\uff09<\/td>S24 \u51fa\u5382\u56fa\u4ef6\uff08\u63a8\u65ad\uff09<\/td><\/tr>
    6.1.75 \u53ca\u4ee5\u540e<\/strong><\/td>bvec + MSG_SPLICE_PAGES<\/code><\/td>\u274c \u4e0d\u53ef\u8fbe<\/strong><\/td>S24 \u5168\u7cfb\u73b0\u884c\u56fa\u4ef6<\/strong><\/td><\/tr>
    6.5 \/ 6.6+<\/td>\u65e0 udp_sendpage<\/code>\uff0c\u8d70 splice_to_socket<\/code><\/td>\u2705 \u53ef\u8fbe<\/td>S25 \/ S938B<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
    \u4e00\u53e5\u8bdd\u603b\u7ed3<\/strong>\uff1a<\/p>\n\n\n\n
    \n
    DirtyFrag \u7684\u5bc6\u7801\u5b66\u6211\u4eec\u5168\u5bf9\u3001\u5185\u6838\u4e5f\u786e\u5b9e\u6ca1\u6253\u8865\u4e01\uff0c\u4f46 6.1 \u7684 UDP \u53d1\u9001\u8def\u5f84\u538b\u6839\u4e0d\u4f1a\u628a
    \u9875\u7f13\u5b58\u9875\u5171\u4eab\u8fdb skb \u2014\u2014 \u7f3a\u7684\u662f 6.5 \u624d\u6709\u7684 MSG_SPLICE_PAGES<\/code> \u8bed\u4e49\uff0c\u800c 6.1.y \u7684”\u534a\u622a\u56de\u79fb”
    \u8ba9\u8fd9\u6761\u80fd\u529b\u53ea\u5230\u4e00\u534a\u3002\u5907\u9009\u7684 RxRPC \u4e0e AF_ALG \u5728\u672c\u5185\u6838\u914d\u7f6e\u4e0b\u90fd\u6ca1\u6709\u7f16\u8bd1\uff0c
    \u539f PoC \u4f9d\u8d56\u7684 user namespace \u4e5f\u6ca1\u6709\u5f00\u542f\u3002<\/p>\n\n\n\n
    S24 \u4e0a\u8fd9\u6761\u8def\u662f\u7ed3\u6784\u6027\u4e0d\u901a\uff0c\u4e0d\u662f\u8c03\u53c2\u95ee\u9898\u3002<\/strong><\/p>\n<\/blockquote>\n\n\n\n
    \u5bf9 S24 \u6765\u8bf4\uff0c\u73b0\u5b9e\u7ed3\u8bba\u662f\uff1a\u60f3\u8981\u514d\u89e3\u9501 root\uff0c\u8fd8\u662f\u5f97\u56de\u5230\u7ade\u6001\u578b\u7684\u90a3\u5957\u65b9\u6848\uff1b
    DirtyFrag \u7684”\u786e\u5b9a\u6027 + \u5f00\u673a\u81ea\u52a8\u6062\u590d”\u8fd9\u5957\u597d\u5904\uff0c\u5f97\u7b49\u5230 6.6 \u53ca\u4ee5\u4e0a\u5185\u6838\u7684\u673a\u578b\u624d\u6709\u3002<\/p>\n\n\n\n
    \n\n\n\n
    0x08 \u590d\u73b0\u9644\u5f55<\/h2>\n\n\n\n
    \u6750\u6599<\/th>\u8bf4\u660e<\/th><\/tr><\/thead>
    \u72ec\u7acb\u63a2\u9488 tools\/psp.c<\/code><\/td>\u81ea\u7814\uff1b\u9759\u6001\u4e8c\u8fdb\u5236\uff1badb shell \/data\/local\/tmp\/psp <\u76ee\u5f55><\/code><\/td><\/tr>
    app \u5185\u63a2\u9488 tools\/page_share_probe.c<\/code><\/td>\u4fbf\u4e8e\u7f16\u8fdb\u4efb\u4f55 app \u7684 native \u5e93<\/td><\/tr>
    \u5b8c\u6574\u8bc1\u636e\u5f52\u6863 FEASIBILITY_VERDICT.md<\/code><\/td>\u542b\u5168\u90e8\u539f\u59cb\u8f93\u51fa\u4e0e\u53cd\u6c47\u7f16\u7ed3\u8bba<\/td><\/tr>
    \u5185\u6838\u955c\u50cf 01_\u56fa\u4ef6\u5185\u6838\/vmlinux_dzh3.elf<\/code>\u3001vmlinux_CZB2.elf<\/code><\/td>\u53cd\u6c47\u7f16\u4e0e\u7b26\u53f7\u666e\u67e5\u7684\u5bf9\u8c61<\/td><\/tr>
    \u8bbe\u5907\u81ea\u62a5\u914d\u7f6e<\/td>zcat \/proc\/config.gz<\/code>\uff087694 \u884c\uff09<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
    \u9a8c\u8bc1\u73af\u5883\uff1a<\/p>\n\n\n\n
    \u673a\u578b    SM-S9280\uff08e3q\uff0c\u56fd\u884c DZH3\uff09\n\u7cfb\u7edf    Android 16\uff08API 36\uff09\n\u56fa\u4ef6    BP4A.251205.006.S9280ZCS6DZH3\n\u5185\u6838    6.1.145-android14-11-3254743-abS9280ZCS6DZH3\nKMI     android14-6.1\n\u8865\u4e01\u7ea7  2026-08-05\n\u5bf9\u7167\u7ec4  CZB2 = 6.1.128-android14-11-2755301-abS9280ZCS5CZB2\uff08\u9010\u9879\u76f8\u540c\uff09<\/code><\/pre>\n\n\n\n
    \n
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    \u5f15\u7528\u5230\u7684\u7b2c\u4e09\u65b9\u5b9e\u73b0\/\u6587\u6863\u5747\u65e0 LICENSE\uff0c\u672c\u6587\u53ea\u5f15\u7528\u5176\u7ed3\u8bba\u4e0e\u4e8b\u5b9e\uff0c\u672a\u590d\u5236\u5176\u4ee3\u7801\uff1b
    \u6587\u4e2d\u63a2\u9488\u3001\u8f6c\u6362\u5de5\u5177\u7b49\u5747\u4e3a\u81ea\u884c\u5b9e\u73b0\u3002<\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"
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