{"schema":"threatline.record/2","record":{"id":"CVE-2026-93269","aliases":[],"summary":"ext4: fix circular lock dependency in ext4_ext_migrate","details":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix circular lock dependency in ext4_ext_migrate\n\nMove iput(tmp_inode) after ext4_writepages_up_write() to avoid a\ncircular lock dependency between s_writepages_rwsem and sb_internal\n(freeze protection).\n\nThe deadlock scenario:\n\n  CPU0 (EXT4_IOC_MIGRATE)        CPU1 (orphan cleanup during mount)\n  ----                           ----\n  ext4_ext_migrate()\n    ext4_writepages_down_write()\n      s_writepages_rwsem (write)\n                                 ext4_evict_inode()\n                                   sb_start_intwrite()   [sb_internal]\n                                   ...\n                                     ext4_writepages()\n                                       s_writepages_rwsem (read) [BLOCKED]\n    iput(tmp_inode)\n      ext4_evict_inode()\n        sb_start_intwrite()         [BLOCKED]\n\nThe tmp_inode is a temporary inode with nlink=0 created solely for\nbuilding the extent tree.  Its eviction does not require\ns_writepages_rwsem protection, so deferring iput() until after\nreleasing the rwsem is safe.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93269","source_modified_at":"2026-10-19T09:08:23.592Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"cb85f4d23f794e24127f3e562cb3b54b0803f456","lessThan":"452950461241dfed8b1d32e94b227db38c99c5af","status":"affected","versionType":"git"},{"version":"cb85f4d23f794e24127f3e562cb3b54b0803f456","lessThan":"ada23457d4748d6e9c36c6f871fc29a6f558c48c","status":"affected","versionType":"git"},{"version":"cb85f4d23f794e24127f3e562cb3b54b0803f456","lessThan":"e4223231b6860141813637a6413c2371ae4d6fa8","status":"affected","versionType":"git"},{"version":"cb85f4d23f794e24127f3e562cb3b54b0803f456","lessThan":"32f7ab52875ec7f800ca67e7176e5743a84baddf","status":"affected","versionType":"git"},{"version":"cb85f4d23f794e24127f3e562cb3b54b0803f456","lessThan":"a897682793eba5de51ee6f3152760374afa629cf","status":"affected","versionType":"git"},{"version":"eb799e163dc2bc1ea0a4820b66f79d32a5e907df","status":"affected","versionType":"git"},{"version":"bcc1eab71a67c46b9e24544ac7923f44444174ce","status":"affected","versionType":"git"},{"version":"8cf20fb73e73a4c4df0328b5297842c5ef34fdd9","status":"affected","versionType":"git"},{"version":"e5d25003d059649e18a249635ed5ca7a7b1de5ad","status":"affected","versionType":"git"},{"version":"69f8a7991fd93c49096ddd11574db3e7df238b7b","status":"affected","versionType":"git"},{"version":"4.9.215","lessThan":"4.10","status":"affected","versionType":"semver"},{"version":"4.14.172","lessThan":"4.15","status":"affected","versionType":"semver"},{"version":"4.19.107","lessThan":"4.20","status":"affected","versionType":"semver"},{"version":"5.4.23","lessThan":"5.5","status":"affected","versionType":"semver"},{"version":"5.5.7","lessThan":"5.6","status":"affected","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93269","source_modified_at":"2026-10-19T09:08:23.592Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"5.6","status":"affected"},{"version":"0","lessThan":"5.6","status":"unaffected","versionType":"semver"},{"version":"6.6.157","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.110","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.52","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.6","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-2026-93269","source_modified_at":"2026-10-19T09:08:23.592Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"452950461241dfed8b1d32e94b227db38c99c5af","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93269","source_modified_at":"2026-10-19T09:08:23.592Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"32f7ab52875ec7f800ca67e7176e5743a84baddf","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93269","source_modified_at":"2026-10-19T09:08:23.592Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"4.10","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93269","source_modified_at":"2026-10-19T09:08:23.592Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"4.15","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93269","source_modified_at":"2026-10-19T09:08:23.592Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"4.20","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93269","source_modified_at":"2026-10-19T09:08:23.592Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"5.5","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93269","source_modified_at":"2026-10-19T09:08:23.592Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"5.6","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00186,"percentile":0.0783,"score_date":"2026-10-23"},"published_at":"2026-09-24T15:52:09.047Z","modified_at":"2026-10-19T09:08:23.592Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-93269","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:08:23.592Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-93269","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/452950461241dfed8b1d32e94b227db38c99c5af"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/ada23457d4748d6e9c36c6f871fc29a6f558c48c"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/e4223231b6860141813637a6413c2371ae4d6fa8"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/32f7ab52875ec7f800ca67e7176e5743a84baddf"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/a897682793eba5de51ee6f3152760374afa629cf"}],"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":"2026-10-19T09:08:23.592Z","content_hash":"dfa3fe260c54b2379a0ac77688c3231a83da2c08fc4d46ed7501df288e699d59"}}