{"schema":"threatline.record/2","record":{"id":"CVE-2026-98443","aliases":[],"summary":"xfs: fix cursor and pointer handling when recovering iunlink buckets","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: fix cursor and pointer handling when recovering iunlink buckets\n\nLOLLM pointed out a bug in xlog_recover_iunlink_bucket:\n\n1. We don't null out prev_ip after releasing it, which can lead to UAF\n   problems if the inodegc flush call in the loop fails.\n\nat which point I noticed even more bugs:\n\n2. If the inodegc flush inside the loop fails, we also leak @ip.\n\n3. We set prev_agino to agino having already advanced agino, which\n   results in inodes with i_prev_unlinked set to itself.\n\n4. If we exit the bottom of the loop with prev_ip set, then prev_ip\n   aliases ip and we also set its i_prev_unlinked to itself.\n\nBugs 3 and 4 introduce loops into the unlinked list, though these loops\ndon't surface because we immediately flush each unlinked inode after\nloading it.\n\nFix all of these issues.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98443","source_modified_at":"2026-10-21T12:55:04.681Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"04755d2e5821b3afbaadd09fe5df58d04de36484","lessThan":"47a948ba653a463d429e02fda2f06a3d6b78666d","status":"affected","versionType":"git"},{"version":"04755d2e5821b3afbaadd09fe5df58d04de36484","lessThan":"8c9d5b8a96d6b93eb24e07b4163c89341ba29bd1","status":"affected","versionType":"git"},{"version":"04755d2e5821b3afbaadd09fe5df58d04de36484","lessThan":"66a2179d02668f8df44b1a249899006f3ba38ea0","status":"affected","versionType":"git"},{"version":"04755d2e5821b3afbaadd09fe5df58d04de36484","lessThan":"961c717e6bf0e53c2c2b1fe4aef1add9390fedab","status":"affected","versionType":"git"},{"version":"04755d2e5821b3afbaadd09fe5df58d04de36484","lessThan":"65f39d09d73718611cee40399179323b5d4ead00","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98443","source_modified_at":"2026-10-21T12:55:04.681Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"6.0","status":"affected"},{"version":"0","lessThan":"6.0","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":"6.18.55","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-2026-98443","source_modified_at":"2026-10-21T12:55:04.681Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"47a948ba653a463d429e02fda2f06a3d6b78666d","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98443","source_modified_at":"2026-10-21T12:55:04.681Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"8c9d5b8a96d6b93eb24e07b4163c89341ba29bd1","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98443","source_modified_at":"2026-10-21T12:55:04.681Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"66a2179d02668f8df44b1a249899006f3ba38ea0","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98443","source_modified_at":"2026-10-21T12:55:04.681Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"961c717e6bf0e53c2c2b1fe4aef1add9390fedab","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98443","source_modified_at":"2026-10-21T12:55:04.681Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"65f39d09d73718611cee40399179323b5d4ead00","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00168,"percentile":0.05744,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:14:53.597Z","modified_at":"2026-10-21T12:55:04.681Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98443","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-21T12:55:04.681Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98443","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/47a948ba653a463d429e02fda2f06a3d6b78666d"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/8c9d5b8a96d6b93eb24e07b4163c89341ba29bd1"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/66a2179d02668f8df44b1a249899006f3ba38ea0"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/961c717e6bf0e53c2c2b1fe4aef1add9390fedab"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/65f39d09d73718611cee40399179323b5d4ead00"}],"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":"2026-10-21T12:55:04.681Z","content_hash":"b056dfb7e3a9f6f11c8917426d60e023372e11c2ed1d4075ae93545b77d6cd1f"}}