{"schema":"threatline.record/2","record":{"id":"CVE-2026-99032","aliases":[],"summary":"net/smc: protect clcsock lifetime in smc_getname","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: protect clcsock lifetime in smc_getname\n\nsmc_getname() dereferences smc->clcsock without holding\nclcsock_release_lock. Link-group termination can release the CLC socket\nthrough smc_close_active_abort() while the SMC socket is still open,\nfor example after shutdown(SHUT_WR).\n\nA getsockname() caller can load smc->clcsock, then the termination worker\ncan clear the pointer and call sock_release() before the caller accesses\nclcsock->ops or invokes getname(). This causes a use-after-free; if the\nworker clears the pointer before the load, it causes a NULL dereference.\nThe syscall's file reference keeps the SMC socket alive but does not\nprevent asynchronous release of its CLC socket.\n\nKASAN reported the following with test-only timing instrumentation:\n\n  BUG: KASAN: slab-use-after-free in smc_getname+0x19e/0x1b0\n  Read of size 8 at addr ffff888109abb4e0 by task poc/103\n  Call Trace:\n   smc_getname+0x19e/0x1b0\n   do_getsockname+0xe5/0x170\n   __sys_getsockname+0x8c/0x100\n\n  Allocated by task 95:\n   sock_alloc_inode+0x1e/0x280\n   sock_alloc+0x3d/0x240\n   __sock_create+0x7e/0x430\n   smc_create+0x121/0x240\n\n  Freed by task 0:\n   kmem_cache_free+0xcc/0x340\n   rcu_core+0x50a/0x1850\n\n  Last potentially related work creation:\n   evict+0x446/0x6c0\n   smc_clcsock_release+0xa8/0xd0\n   smc_close_active_abort+0x26a/0x3a0\n   __smc_lgr_terminate.part.0+0x137/0x2e0\n\nHold clcsock_release_lock across the pointer check and the getname()\ncallback to serialize with smc_clcsock_release(). Return -EBADF if the\nCLC socket has already been released, preserving the existing peer\nstate check and the callback's return value otherwise.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99032","source_modified_at":"2026-10-23T12:21:36.202Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Linux","vendor":"Linux","versions":[{"version":"b03faa1fafc8018295401dc558bdc76362d860a4","lessThan":"e607017a553d2a48e428ec8b8ffb06bf3bb92ce9","status":"affected","versionType":"git"},{"version":"b03faa1fafc8018295401dc558bdc76362d860a4","lessThan":"1512e3714b3946bda75a160a34f22a51710daa43","status":"affected","versionType":"git"},{"version":"b03faa1fafc8018295401dc558bdc76362d860a4","lessThan":"6a1833f0d7dc037c8e876b9178ba69d5d107c086","status":"affected","versionType":"git"},{"version":"b03faa1fafc8018295401dc558bdc76362d860a4","lessThan":"c223da71abfaea2ebb1c7208ae9ebf15038f9388","status":"affected","versionType":"git"},{"version":"b03faa1fafc8018295401dc558bdc76362d860a4","lessThan":"64a6b36b0e1855288080bc5f89769f27d6dc03c8","status":"affected","versionType":"git"},{"version":"0b6153d04c96a1d4b6284692386aa21d04d7956c","status":"affected","versionType":"git"},{"version":"4.19.299","lessThan":"4.20","status":"affected","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99032","source_modified_at":"2026-10-23T12:21:36.202Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Linux","vendor":"Linux","versions":[{"version":"5.1","status":"affected"},{"version":"0","lessThan":"5.1","status":"unaffected","versionType":"semver"},{"version":"6.6.160","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.113","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.57","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.11","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99032","source_modified_at":"2026-10-23T12:21:36.202Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"1512e3714b3946bda75a160a34f22a51710daa43","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99032","source_modified_at":"2026-10-23T12:21:36.202Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"6a1833f0d7dc037c8e876b9178ba69d5d107c086","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99032","source_modified_at":"2026-10-23T12:21:36.202Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"64a6b36b0e1855288080bc5f89769f27d6dc03c8","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99032","source_modified_at":"2026-10-23T12:21:36.202Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"4.20","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-23T12:21:36.202Z","modified_at":"2026-10-23T12:21:36.202Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-99032","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T12:21:36.202Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/e607017a553d2a48e428ec8b8ffb06bf3bb92ce9"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/1512e3714b3946bda75a160a34f22a51710daa43"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/6a1833f0d7dc037c8e876b9178ba69d5d107c086"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/c223da71abfaea2ebb1c7208ae9ebf15038f9388"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/64a6b36b0e1855288080bc5f89769f27d6dc03c8"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-23T12:21:36.202Z","content_hash":"598df4b74ea412284a27bab67617cdde26ebd32bdaeed7257466e6c98ff29230"}}