{"schema":"threatline.record/2","record":{"id":"CVE-2026-98543","aliases":[],"summary":"bpf: fs/xattr: don't assume the inode is locked in path_unlink/path_rmdir","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: fs/xattr: don't assume the inode is locked in path_unlink/path_rmdir\n\nbpf_lsm_has_d_inode_locked() makes the verifier rewrite\nbpf_[set|remove]_dentry_xattr() to the _locked variants, which assume\nthat the caller already holds the inode's i_rwsem.  The path_unlink and\npath_rmdir hooks are listed, but security_path_unlink() and\nsecurity_path_rmdir() run before vfs_unlink()/vfs_rmdir() take the\nvictim inode's i_rwsem, so a sleepable BPF LSM program attached to\neither hook mutates the victim's xattrs without the lock held.\n\nDrop the two path hooks from d_inode_locked_hooks so that the verifier\nkeeps the locking bpf_[set|remove]_dentry_xattr() variants, which take\nthe lock themselves.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98543","source_modified_at":"2026-10-19T09:21:26.563Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"56467292794b800164df20c076c409ac548e56ec","lessThan":"7504b677c4370c9e4b153c553ff8831c093b1ff6","status":"affected","versionType":"git"},{"version":"56467292794b800164df20c076c409ac548e56ec","lessThan":"640d37fbd34d03af727dbc567f48c0203d1de6b4","status":"affected","versionType":"git"},{"version":"56467292794b800164df20c076c409ac548e56ec","lessThan":"35d442ed1f86465e49df3119fb898f985186db13","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98543","source_modified_at":"2026-10-19T09:21:26.563Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"6.15","status":"affected"},{"version":"0","lessThan":"6.15","status":"unaffected","versionType":"semver"},{"version":"6.18.55","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.9","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-2026-98543","source_modified_at":"2026-10-19T09:21:26.563Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"7504b677c4370c9e4b153c553ff8831c093b1ff6","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98543","source_modified_at":"2026-10-19T09:21:26.563Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"640d37fbd34d03af727dbc567f48c0203d1de6b4","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98543","source_modified_at":"2026-10-19T09:21:26.563Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"35d442ed1f86465e49df3119fb898f985186db13","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00198,"percentile":0.09056,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:18:10.823Z","modified_at":"2026-10-19T09:21:26.563Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98543","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:21:26.563Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98543","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/7504b677c4370c9e4b153c553ff8831c093b1ff6"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/640d37fbd34d03af727dbc567f48c0203d1de6b4"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/35d442ed1f86465e49df3119fb898f985186db13"}],"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":"2026-10-19T09:21:26.563Z","content_hash":"c3a3a23fc5e4d366a9d848a592f96c33ecd6ee1afd063dc88f2b76cf13d02dd9"}}