{"api_version":"1","generated_at":"2026-09-24T17:37:32+00:00","cve":"CVE-2026-93268","urls":{"html":"https://cve.report/CVE-2026-93268","api":"https://cve.report/api/cve/CVE-2026-93268.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-93268","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-93268"},"summary":{"title":"ext4: skip extra isize expansion during mount to prevent deadlock","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-24 16:17:23","updated_at":"2026-09-24 16:17:23"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/9c3469377b1d8caba6bec6ef3c460810bbfb02cc","name":"https://git.kernel.org/stable/c/9c3469377b1d8caba6bec6ef3c460810bbfb02cc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2fb8ff81659a57c42bb7b49e8339a2be2a318ef8","name":"https://git.kernel.org/stable/c/2fb8ff81659a57c42bb7b49e8339a2be2a318ef8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c5e6434cc55f30220b228be237bb666351f9f4dd","name":"https://git.kernel.org/stable/c/c5e6434cc55f30220b228be237bb666351f9f4dd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7461c60b9c6a839b13ad4c3490681a0cf5aa0637","name":"https://git.kernel.org/stable/c/7461c60b9c6a839b13ad4c3490681a0cf5aa0637","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7ace189b9ea79cf78df9c32b940ce12735f9459a","name":"https://git.kernel.org/stable/c/7ace189b9ea79cf78df9c32b940ce12735f9459a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7ba09330d9ea6e996228316719eae812d7e04983","name":"https://git.kernel.org/stable/c/7ba09330d9ea6e996228316719eae812d7e04983","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1dd4882dbdc8bfdf2182fa388883c143fac0902a","name":"https://git.kernel.org/stable/c/1dd4882dbdc8bfdf2182fa388883c143fac0902a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/41897f1bcf4ace5f1f28d0be784b6f4f0e929641","name":"https://git.kernel.org/stable/c/41897f1bcf4ace5f1f28d0be784b6f4f0e929641","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93268","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93268","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c8585c6fcaf2011de54c3592e80a634a2b9e1a7f 41897f1bcf4ace5f1f28d0be784b6f4f0e929641 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c8585c6fcaf2011de54c3592e80a634a2b9e1a7f 9c3469377b1d8caba6bec6ef3c460810bbfb02cc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c8585c6fcaf2011de54c3592e80a634a2b9e1a7f 1dd4882dbdc8bfdf2182fa388883c143fac0902a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c8585c6fcaf2011de54c3592e80a634a2b9e1a7f 7ba09330d9ea6e996228316719eae812d7e04983 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c8585c6fcaf2011de54c3592e80a634a2b9e1a7f c5e6434cc55f30220b228be237bb666351f9f4dd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c8585c6fcaf2011de54c3592e80a634a2b9e1a7f 7ace189b9ea79cf78df9c32b940ce12735f9459a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c8585c6fcaf2011de54c3592e80a634a2b9e1a7f 2fb8ff81659a57c42bb7b49e8339a2be2a318ef8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c8585c6fcaf2011de54c3592e80a634a2b9e1a7f 7461c60b9c6a839b13ad4c3490681a0cf5aa0637 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.7","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.7 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.270 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.221 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.188 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/ext4/inode.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"41897f1bcf4ace5f1f28d0be784b6f4f0e929641","status":"affected","version":"c8585c6fcaf2011de54c3592e80a634a2b9e1a7f","versionType":"git"},{"lessThan":"9c3469377b1d8caba6bec6ef3c460810bbfb02cc","status":"affected","version":"c8585c6fcaf2011de54c3592e80a634a2b9e1a7f","versionType":"git"},{"lessThan":"1dd4882dbdc8bfdf2182fa388883c143fac0902a","status":"affected","version":"c8585c6fcaf2011de54c3592e80a634a2b9e1a7f","versionType":"git"},{"lessThan":"7ba09330d9ea6e996228316719eae812d7e04983","status":"affected","version":"c8585c6fcaf2011de54c3592e80a634a2b9e1a7f","versionType":"git"},{"lessThan":"c5e6434cc55f30220b228be237bb666351f9f4dd","status":"affected","version":"c8585c6fcaf2011de54c3592e80a634a2b9e1a7f","versionType":"git"},{"lessThan":"7ace189b9ea79cf78df9c32b940ce12735f9459a","status":"affected","version":"c8585c6fcaf2011de54c3592e80a634a2b9e1a7f","versionType":"git"},{"lessThan":"2fb8ff81659a57c42bb7b49e8339a2be2a318ef8","status":"affected","version":"c8585c6fcaf2011de54c3592e80a634a2b9e1a7f","versionType":"git"},{"lessThan":"7461c60b9c6a839b13ad4c3490681a0cf5aa0637","status":"affected","version":"c8585c6fcaf2011de54c3592e80a634a2b9e1a7f","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/ext4/inode.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.7"},{"lessThan":"4.7","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.270","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.221","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.188","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.270","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.221","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"4.7","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-09-24T15:52:07.310Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/41897f1bcf4ace5f1f28d0be784b6f4f0e929641"},{"url":"https://git.kernel.org/stable/c/9c3469377b1d8caba6bec6ef3c460810bbfb02cc"},{"url":"https://git.kernel.org/stable/c/1dd4882dbdc8bfdf2182fa388883c143fac0902a"},{"url":"https://git.kernel.org/stable/c/7ba09330d9ea6e996228316719eae812d7e04983"},{"url":"https://git.kernel.org/stable/c/c5e6434cc55f30220b228be237bb666351f9f4dd"},{"url":"https://git.kernel.org/stable/c/7ace189b9ea79cf78df9c32b940ce12735f9459a"},{"url":"https://git.kernel.org/stable/c/2fb8ff81659a57c42bb7b49e8339a2be2a318ef8"},{"url":"https://git.kernel.org/stable/c/7461c60b9c6a839b13ad4c3490681a0cf5aa0637"}],"title":"ext4: skip extra isize expansion during mount to prevent deadlock","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-93268","datePublished":"2026-09-24T15:52:07.310Z","dateReserved":"2026-09-17T16:02:15.097Z","dateUpdated":"2026-09-24T15:52:07.310Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-24 16:17:23","lastModifiedDate":"2026-09-24 16:17:23","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"93268","Ordinal":"1","Title":"ext4: skip extra isize expansion during mount to prevent deadloc","CVE":"CVE-2026-93268","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"93268","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"ext4: skip extra isize expansion during mount to prevent deadloc"}]}}}