{"schema":"threatline.record/2","record":{"id":"CVE-2026-99051","aliases":[],"summary":"fsverity: RCU-delay the freeing of struct fsverity_info","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nfsverity: RCU-delay the freeing of struct fsverity_info\n\n__fsverity_get_info() calls rhashtable_lookup_fast(), which just uses\nrcu_read_lock() and doesn't directly synchronize with\nfsverity_remove_info().\n\nFor the same inode this isn't a problem: its fsverity_info is removed\nonly at inode eviction time or upon failure to enable verity, when the\ninode no longer needs its fsverity_info and it will no longer be\naccessed via that inode.\n\nHowever, this is broken and can cause a use-after-free for concurrent\n__fsverity_get_info() for *different* inodes.  Those rely on following\nfsverity_info::rhash_head in the rhashtable under rcu_read_lock() only.\nThey also use fsverity_info::inode to do the key comparison.\n\nFix this by RCU-delaying the freeing of 'struct fsverity_info' after\nit's been removed from the rhashtable.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99051","source_modified_at":"2026-10-24T14:10:12.469Z","fetched_at":"2026-10-24T14:26:37.433577Z","product":"Linux","vendor":"Linux","versions":[{"lessThan":"fa84f091a8e7fc46fd29834496fab9739dd4c8dc","status":"affected","version":"f77f281b61183a5c0b87e6a4d101c70bd32c1c79","versionType":"git"},{"lessThan":"e58c3805ed325fe2d4ae2dd467c0486cc860b733","status":"affected","version":"f77f281b61183a5c0b87e6a4d101c70bd32c1c79","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99051","source_modified_at":"2026-10-24T14:10:12.469Z","fetched_at":"2026-10-24T14:26:37.433577Z","product":"Linux","vendor":"Linux","versions":[{"status":"affected","version":"7.0"},{"lessThan":"7.0","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[],"cvss":7.8,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00198,"percentile":0.08998,"score_date":"2026-10-24"},"published_at":"2026-10-23T12:22:30.370Z","modified_at":"2026-10-24T14:10:12.469Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-99051","fetched_at":"2026-10-24T14:26:37.433577Z","source_modified_at":"2026-10-24T14:10:12.469Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-99051","fetched_at":"2026-10-24T18:03:20.872036Z","source_modified_at":"2026-10-24"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/fa84f091a8e7fc46fd29834496fab9739dd4c8dc"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/e58c3805ed325fe2d4ae2dd467c0486cc860b733"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-24T14:10:12.469Z","content_hash":"7e910e2f033cd7de7ddb1010dfbbaacc1d2357d579c0785c880a70a38b029ae4"}}