{"id":"CVE-2026-93268","revision":"79c5d18028dc477c9d0d379884859aa1","records":[{"revision":"79c5d18028dc477c9d0d379884859aa1","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-93268","aliases":[],"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":0,"publishedAt":"2026-09-24T15:52:07.31+00:00","modifiedAt":"2026-10-19T09:08:22.372+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/ext4/inode.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"c8585c6fcaf2011de54c3592e80a634a2b9e1a7f\",\n                            \"lessThan\": \"41897f1bcf4ace5f1f28d0be784b6f4f0e929641\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c8585c6fcaf2011de54c3592e80a634a2b9e1a7f\",\n                            \"lessThan\": \"9c3469377b1d8caba6bec6ef3c460810bbfb02cc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c8585c6fcaf2011de54c3592e80a634a2b9e1a7f\",\n                            \"lessThan\": \"1dd4882dbdc8bfdf2182fa388883c143fac0902a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c8585c6fcaf2011de54c3592e80a634a2b9e1a7f\",\n                            \"lessThan\": \"7ba09330d9ea6e996228316719eae812d7e04983\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c8585c6fcaf2011de54c3592e80a634a2b9e1a7f\",\n                            \"lessThan\": \"c5e6434cc55f30220b228be237bb666351f9f4dd\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c8585c6fcaf2011de54c3592e80a634a2b9e1a7f\",\n                            \"lessThan\": \"7ace189b9ea79cf78df9c32b940ce12735f9459a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c8585c6fcaf2011de54c3592e80a634a2b9e1a7f\",\n                            \"lessThan\": \"2fb8ff81659a57c42bb7b49e8339a2be2a318ef8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c8585c6fcaf2011de54c3592e80a634a2b9e1a7f\",\n                            \"lessThan\": \"7461c60b9c6a839b13ad4c3490681a0cf5aa0637\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/ext4/inode.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.7\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.7\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.270\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/41897f1bcf4ace5f1f28d0be784b6f4f0e929641","https://git.kernel.org/stable/c/9c3469377b1d8caba6bec6ef3c460810bbfb02cc","https://git.kernel.org/stable/c/1dd4882dbdc8bfdf2182fa388883c143fac0902a","https://git.kernel.org/stable/c/7ba09330d9ea6e996228316719eae812d7e04983","https://git.kernel.org/stable/c/c5e6434cc55f30220b228be237bb666351f9f4dd","https://git.kernel.org/stable/c/7ace189b9ea79cf78df9c32b940ce12735f9459a","https://git.kernel.org/stable/c/2fb8ff81659a57c42bb7b49e8339a2be2a318ef8","https://git.kernel.org/stable/c/7461c60b9c6a839b13ad4c3490681a0cf5aa0637"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93268","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-93268","identifiers":["CVE-2026-93268"]},"retained":false,"historicalAffected":[]}],"coverage":[]}