{"schema":"threatline.record/2","record":{"id":"CVE-2026-93268","aliases":[],"summary":"ext4: skip extra isize expansion during mount to prevent deadlock","details":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: skip extra isize expansion during mount to prevent deadlock\n\next4_try_to_expand_extra_isize() is called from __ext4_mark_inode_dirty()\nwhile holding an active jbd2 handle.  During mount (!SB_ACTIVE), the\nexpand path may move xattrs to external blocks and release ea_inodes via\niput().  When !SB_ACTIVE, iput() calls write_inode_now() which acquires\ns_writepages_rwsem, creating a circular lock dependency:\n\n  s_writepages_rwsem --> jbd2_handle --> xattr_sem --> s_writepages_rwsem\n\nThis can be triggered via:\n\n  ext4_process_orphan() -> ext4_truncate() -> ext4_mark_inode_dirty()\n    -> ext4_try_to_expand_extra_isize()\n\nor:\n\n  ext4_evict_inode() -> ext4_mark_inode_dirty()\n    -> ext4_try_to_expand_extra_isize()\n\nSkip expansion when !SB_ACTIVE.  This is a minor loss of functionality\n(extra isize won't grow for these inodes during mount), which e2fsck\ncan resolve later if needed.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93268","source_modified_at":"2026-10-19T09:08:22.372Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"c8585c6fcaf2011de54c3592e80a634a2b9e1a7f","lessThan":"41897f1bcf4ace5f1f28d0be784b6f4f0e929641","status":"affected","versionType":"git"},{"version":"c8585c6fcaf2011de54c3592e80a634a2b9e1a7f","lessThan":"9c3469377b1d8caba6bec6ef3c460810bbfb02cc","status":"affected","versionType":"git"},{"version":"c8585c6fcaf2011de54c3592e80a634a2b9e1a7f","lessThan":"1dd4882dbdc8bfdf2182fa388883c143fac0902a","status":"affected","versionType":"git"},{"version":"c8585c6fcaf2011de54c3592e80a634a2b9e1a7f","lessThan":"7ba09330d9ea6e996228316719eae812d7e04983","status":"affected","versionType":"git"},{"version":"c8585c6fcaf2011de54c3592e80a634a2b9e1a7f","lessThan":"c5e6434cc55f30220b228be237bb666351f9f4dd","status":"affected","versionType":"git"},{"version":"c8585c6fcaf2011de54c3592e80a634a2b9e1a7f","lessThan":"7ace189b9ea79cf78df9c32b940ce12735f9459a","status":"affected","versionType":"git"},{"version":"c8585c6fcaf2011de54c3592e80a634a2b9e1a7f","lessThan":"2fb8ff81659a57c42bb7b49e8339a2be2a318ef8","status":"affected","versionType":"git"},{"version":"c8585c6fcaf2011de54c3592e80a634a2b9e1a7f","lessThan":"7461c60b9c6a839b13ad4c3490681a0cf5aa0637","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93268","source_modified_at":"2026-10-19T09:08:22.372Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"4.7","status":"affected"},{"version":"0","lessThan":"4.7","status":"unaffected","versionType":"semver"},{"version":"5.10.270","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.221","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.188","lessThanOrEqual":"6.1.*","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-2026-93268","source_modified_at":"2026-10-19T09:08:22.372Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"41897f1bcf4ace5f1f28d0be784b6f4f0e929641","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93268","source_modified_at":"2026-10-19T09:08:22.372Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"9c3469377b1d8caba6bec6ef3c460810bbfb02cc","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93268","source_modified_at":"2026-10-19T09:08:22.372Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"1dd4882dbdc8bfdf2182fa388883c143fac0902a","basis":"first unaffected version stated in the CVE record"},{"source":"CVE 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List","url":"https://git.kernel.org/stable/c/41897f1bcf4ace5f1f28d0be784b6f4f0e929641"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/9c3469377b1d8caba6bec6ef3c460810bbfb02cc"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/1dd4882dbdc8bfdf2182fa388883c143fac0902a"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/7ba09330d9ea6e996228316719eae812d7e04983"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/c5e6434cc55f30220b228be237bb666351f9f4dd"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/7ace189b9ea79cf78df9c32b940ce12735f9459a"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/2fb8ff81659a57c42bb7b49e8339a2be2a318ef8"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/7461c60b9c6a839b13ad4c3490681a0cf5aa0637"}],"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":"2026-10-19T09:08:22.372Z","content_hash":"f24146348fb3a1b7f31ff27130da0187ba4a49795cc5180b6eb1cbfd6ca2d3a0"}}