{"id":"CVE-2025-38346","revision":null,"records":[{"revision":"18d88fca0136428f868e37b702c0ba02","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-38346","aliases":[],"title":"ftrace: Fix UAF when lookup kallsym after ftrace disabled","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nftrace: Fix UAF when lookup kallsym after ftrace disabled\n\nThe following issue happens with a buggy module:\n\nBUG: unable to handle page fault for address: ffffffffc05d0218\nPGD 1bd66f067 P4D 1bd66f067 PUD 1bd671067 PMD 101808067 PTE 0\nOops: Oops: 0000 [#1] SMP KASAN PTI\nTainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS\nRIP: 0010:sized_strscpy+0x81/0x2f0\nRSP: 0018:ffff88812d76fa08 EFLAGS: 00010246\nRAX: 0000000000000000 RBX: ffffffffc0601010 RCX: dffffc0000000000\nRDX: 0000000000000038 RSI: dffffc0000000000 RDI: ffff88812608da2d\nRBP: 8080808080808080 R08: ffff88812608da2d R09: ffff88812608da68\nR10: ffff88812608d82d R11: ffff88812608d810 R12: 0000000000000038\nR13: ffff88812608da2d R14: ffffffffc05d0218 R15: fefefefefefefeff\nFS: 00007fef552de740(0000) GS:ffff8884251c7000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: ffffffffc05d0218 CR3: 00000001146f0000 CR4: 00000000000006f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n \n ftrace_mod_get_kallsym+0x1ac/0x590\n update_iter_mod+0x239/0x5b0\n s_next+0x5b/0xa0\n seq_read_iter+0x8c9/0x1070\n seq_read+0x249/0x3b0\n proc_reg_read+0x1b0/0x280\n vfs_read+0x17f/0x920\n ksys_read+0xf3/0x1c0\n do_syscall_64+0x5f/0x2e0\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nThe above issue may happen as follows:\n(1) Add kprobe tracepoint;\n(2) insmod test.ko;\n(3) Module triggers ftrace disabled;\n(4) rmmod test.ko;\n(5) cat /proc/kallsyms; --> Will trigger UAF as test.ko already removed;\nftrace_mod_get_kallsym()\n...\nstrscpy(module_name, mod_map->mod->name, MODULE_NAME_LEN);\n...\n\nThe problem is when a module triggers an issue with ftrace and\nsets ftrace_disable. The ftrace_disable is set when an anomaly is\ndiscovered and to prevent any more damage, ftrace stops all text\nmodification. The issue that happened was that the ftrace_disable stops\nmore than just the text modification.\n\nWhen a module is loaded, its init functions can also be traced. Because\nkallsyms deletes the init functions after a module has loaded, ftrace\nsaves them when the module is loaded and function tracing is enabled. This\nallows the output of the function trace to show the init function names\ninstead of just their raw memory addresses.\n\nWhen a module is removed, ftrace_release_mod() is called, and if\nftrace_disable is set, it just returns without doing anything more. The\nproblem here is that it leaves the mod_list still around and if kallsyms\nis called, it will call into this code and access the module memory that\nhas already been freed as it will return:\n\n strscpy(module_name, mod_map->mod->name, MODULE_NAME_LEN);\n\nWhere the \"mod\" no longer exists and triggers a UAF bug.","state":0,"publishedAt":"2025-07-10T08:15:14.29+00:00","modifiedAt":"2026-10-15T21:52:14.553+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"kernel/trace/ftrace.c\"\n ],\n \"versions\": [\n {\n \"version\": \"aba4b5c22cbac296f4081a0476d0c55828f135b4\",\n \"lessThan\": \"d064c68781c19f378af1ae741d9132d35d24b2bb\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"aba4b5c22cbac296f4081a0476d0c55828f135b4\",\n \"lessThan\": \"8690cd3258455bbae64f809e1d3ee0f043661c71\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"aba4b5c22cbac296f4081a0476d0c55828f135b4\",\n \"lessThan\": \"6805582abb720681dd1c87ff677f155dcf4e86c9\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"aba4b5c22cbac296f4081a0476d0c55828f135b4\",\n \"lessThan\": \"03a162933c4a03b9f1a84f7d8482903c7e1e11bb\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"aba4b5c22cbac296f4081a0476d0c55828f135b4\",\n \"lessThan\": \"83a692a9792aa86249d68a8ac0b9d55ecdd255fa\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"aba4b5c22cbac296f4081a0476d0c55828f135b4\",\n \"lessThan\": \"8e89c17dc8970c5f71a3a991f5724d4c8de42d8c\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"aba4b5c22cbac296f4081a0476d0c55828f135b4\",\n \"lessThan\": \"f78a786ad9a5443a29eef4dae60cde85b7375129\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"aba4b5c22cbac296f4081a0476d0c55828f135b4\",\n \"lessThan\": \"f914b52c379c12288b7623bb814d0508dbe7481d\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"kernel/trace/ftrace.c\"\n ],\n \"versions\": [\n {\n \"version\": \"4.15\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"4.15\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.4.295\",\n \"lessThanOrEqual\": \"5.4.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.239\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.186\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.142\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.95\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.35\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.15.4\",\n \"lessThanOrEqual\": \"6.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.16\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/d064c68781c19f378af1ae741d9132d35d24b2bb","https://git.kernel.org/stable/c/8690cd3258455bbae64f809e1d3ee0f043661c71","https://git.kernel.org/stable/c/6805582abb720681dd1c87ff677f155dcf4e86c9","https://git.kernel.org/stable/c/03a162933c4a03b9f1a84f7d8482903c7e1e11bb","https://git.kernel.org/stable/c/83a692a9792aa86249d68a8ac0b9d55ecdd255fa","https://git.kernel.org/stable/c/8e89c17dc8970c5f71a3a991f5724d4c8de42d8c","https://git.kernel.org/stable/c/f78a786ad9a5443a29eef4dae60cde85b7375129","https://git.kernel.org/stable/c/f914b52c379c12288b7623bb814d0508dbe7481d"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-38346","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-38346","identifiers":["CVE-2025-38346"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-09T12:02:21.9910047+00:00","complete":true,"records":1769,"lastAttemptAt":"2026-11-09T12:02:21.9910047+00:00","lastSuccessAt":"2026-11-09T12:02:22.1773794+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:22.1773831+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-24e6fde7b744113daefb8f6135035fb8a5c69c9617c9c0d40574a0376532ffd3-bc5670b92e6417137e6d98178f734a585c0efdac3c24cdab996a156ba398735b","complete":true,"records":421397,"lastAttemptAt":"2026-11-09T12:02:16.4943065+00:00","lastSuccessAt":"2026-11-09T12:02:16.4102763+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:16.4943065+00:00","snapshotPublishedAt":"2026-11-09T11:21:04+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-469e0902b40147e98a6498cf72d41be8","complete":true,"records":13655,"lastAttemptAt":"2026-11-09T12:14:17.3321495+00:00","lastSuccessAt":"2026-11-09T12:14:17.327+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:14:17.327+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13707,"expectedIdentifiers":13707,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-09T12:02:21.9910047+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-09T12:02:21.9910047+00:00","lastSuccessAt":"2026-11-09T12:02:22.1781502+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:22.1781508+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-44231a3c29e84c64b271bb4e9b8f3678","complete":true,"records":13667,"lastAttemptAt":"2026-11-09T12:02:23.2886601+00:00","lastSuccessAt":"2026-11-09T12:02:23.284+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:23.284+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13707,"expectedIdentifiers":13707,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-980593e6977a6d1b4fb1eed5a1ffe88a468736f89f0a06f710924ad59132c023","complete":true,"records":9914,"lastAttemptAt":"2026-11-09T12:02:17.2599038+00:00","lastSuccessAt":"2026-11-08T11:07:07.068788+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:17.2599038+00:00","snapshotPublishedAt":"2026-11-08T11:02:46+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-fde804134ecdda0ddd5ff5c26ee1fff5a6fa659311f7ef2e51c6ad54964db0e2","complete":true,"records":1971,"lastAttemptAt":"2026-11-09T12:02:16.7165115+00:00","lastSuccessAt":"2026-11-06T19:03:17.0399903+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:16.7165115+00:00","snapshotPublishedAt":"2026-11-06T18:17:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-c905fa1bd26c7b261e77cc7202a86dc766ff31c2b096b501f3bf44f561e34970","complete":true,"records":3063,"lastAttemptAt":"2026-11-09T12:02:21.9559708+00:00","lastSuccessAt":"2026-11-09T12:02:21.7931207+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:21.9559708+00:00","snapshotPublishedAt":"2026-11-09T11:18:00+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-e6e6ac3eaece246ff08884368fe1dc99d4d393571e77c126c8f4d38d66697688","complete":true,"records":231297,"lastAttemptAt":"2026-11-09T12:02:17.0901763+00:00","lastSuccessAt":"2026-11-09T10:04:27.0059369+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:17.0901763+00:00","snapshotPublishedAt":"2026-11-09T09:33:10+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}