{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-93268",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-93268",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-24T15:52:07.310Z",
    "updatedAt": "2026-10-19T09:08:22.372Z",
    "importedAt": "2026-10-24T01:58:35.090Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "ext4: skip extra isize expansion during mount to prevent deadlock",
      "summary": "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": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "c8585c6fcaf2011de54c3592e80a634a2b9e1a7f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "41897f1bcf4ace5f1f28d0be784b6f4f0e929641"
            },
            {
              "version": "c8585c6fcaf2011de54c3592e80a634a2b9e1a7f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9c3469377b1d8caba6bec6ef3c460810bbfb02cc"
            },
            {
              "version": "c8585c6fcaf2011de54c3592e80a634a2b9e1a7f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1dd4882dbdc8bfdf2182fa388883c143fac0902a"
            },
            {
              "version": "c8585c6fcaf2011de54c3592e80a634a2b9e1a7f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7ba09330d9ea6e996228316719eae812d7e04983"
            },
            {
              "version": "c8585c6fcaf2011de54c3592e80a634a2b9e1a7f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c5e6434cc55f30220b228be237bb666351f9f4dd"
            },
            {
              "version": "c8585c6fcaf2011de54c3592e80a634a2b9e1a7f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7ace189b9ea79cf78df9c32b940ce12735f9459a"
            },
            {
              "version": "c8585c6fcaf2011de54c3592e80a634a2b9e1a7f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2fb8ff81659a57c42bb7b49e8339a2be2a318ef8"
            },
            {
              "version": "c8585c6fcaf2011de54c3592e80a634a2b9e1a7f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7461c60b9c6a839b13ad4c3490681a0cf5aa0637"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.7",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.7"
            },
            {
              "version": "5.10.270",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.221",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.188",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.157",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.110",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.52",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.6",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}