CVE-2026-93268

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-93268", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-17T16:02:15.097Z", "datePublished": "2026-09-24T15:52:07.310Z", "dateUpdated": "2026-10-19T09:08:22.372Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:08:22.372Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ext4/inode.c"], "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"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ext4/inode.c"], "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"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "5.10.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "7.3"}]}]}], "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"}}}}

{}

{"affected": [{"affectedData": [{"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", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-93268", "lastModified": "2026-10-19T10:17:18.230", "metrics": {}, "published": "2026-09-24T16:17:23.730", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1dd4882dbdc8bfdf2182fa388883c143fac0902a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2fb8ff81659a57c42bb7b49e8339a2be2a318ef8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/41897f1bcf4ace5f1f28d0be784b6f4f0e929641"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7461c60b9c6a839b13ad4c3490681a0cf5aa0637"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7ace189b9ea79cf78df9c32b940ce12735f9459a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7ba09330d9ea6e996228316719eae812d7e04983"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9c3469377b1d8caba6bec6ef3c460810bbfb02cc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c5e6434cc55f30220b228be237bb666351f9f4dd"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: ext4: skip extra isize expansion during mount to prevent deadlock", "id": "2540316", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2540316"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-833", "details": ["In the Linux kernel, the following vulnerability has been resolved:\next4: skip extra isize expansion during mount to prevent deadlock\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:\ns_writepages_rwsem --> jbd2_handle --> xattr_sem --> s_writepages_rwsem\nThis can be triggered via:\next4_process_orphan() -> ext4_truncate() -> ext4_mark_inode_dirty()\n-> ext4_try_to_expand_extra_isize()\nor:\next4_evict_inode() -> ext4_mark_inode_dirty()\n-> ext4_try_to_expand_extra_isize()\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.", "A flaw was found in the Linux kernel's ext4 file system. When mounting a file system, expanding extended attribute storage while holding an active journal lock can create a circular locking dependency. A local user capable of mounting or triggering file system recovery operations could exploit this flaw to cause a system deadlock, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-93268", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-93268\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-93268\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93268.mbox"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c8585c6fcaf2011de54c3592e80a634a2b9e1a7f,41897f1bcf4ace5f1f28d0be784b6f4f0e929641)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c8585c6fcaf2011de54c3592e80a634a2b9e1a7f,9c3469377b1d8caba6bec6ef3c460810bbfb02cc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c8585c6fcaf2011de54c3592e80a634a2b9e1a7f,1dd4882dbdc8bfdf2182fa388883c143fac0902a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c8585c6fcaf2011de54c3592e80a634a2b9e1a7f,7ba09330d9ea6e996228316719eae812d7e04983)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c8585c6fcaf2011de54c3592e80a634a2b9e1a7f,7ace189b9ea79cf78df9c32b940ce12735f9459a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c8585c6fcaf2011de54c3592e80a634a2b9e1a7f,c5e6434cc55f30220b228be237bb666351f9f4dd)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c8585c6fcaf2011de54c3592e80a634a2b9e1a7f,2fb8ff81659a57c42bb7b49e8339a2be2a318ef8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c8585c6fcaf2011de54c3592e80a634a2b9e1a7f,7461c60b9c6a839b13ad4c3490681a0cf5aa0637)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c8585c6fcaf2011de54c3592e80a634a2b9e1a7f,7461c60b9c6a839b13ad4c3490681a0cf5aa0637)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[4.7,4.7]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.7)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.10.270,5.10.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.15.221,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.188,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.157,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.110,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2.6,7.2.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.52,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.110,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.157,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.188,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.15.221,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.10.270,5.10.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[4.7,4.7]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-25T04:00:13.930025+00:00", "updated": "2026-10-01T21:15:09.067088+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}