{
  "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-2026-93269",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-93269",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-24T15:52:09.047Z",
    "updatedAt": "2026-10-19T09:08:23.592Z",
    "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: fix circular lock dependency in ext4_ext_migrate",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix circular lock dependency in ext4_ext_migrate\n\nMove iput(tmp_inode) after ext4_writepages_up_write() to avoid a\ncircular lock dependency between s_writepages_rwsem and sb_internal\n(freeze protection).\n\nThe deadlock scenario:\n\n  CPU0 (EXT4_IOC_MIGRATE)        CPU1 (orphan cleanup during mount)\n  ----                           ----\n  ext4_ext_migrate()\n    ext4_writepages_down_write()\n      s_writepages_rwsem (write)\n                                 ext4_evict_inode()\n                                   sb_start_intwrite()   [sb_internal]\n                                   ...\n                                     ext4_writepages()\n                                       s_writepages_rwsem (read) [BLOCKED]\n    iput(tmp_inode)\n      ext4_evict_inode()\n        sb_start_intwrite()         [BLOCKED]\n\nThe tmp_inode is a temporary inode with nlink=0 created solely for\nbuilding the extent tree.  Its eviction does not require\ns_writepages_rwsem protection, so deferring iput() until after\nreleasing the rwsem is safe.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "cb85f4d23f794e24127f3e562cb3b54b0803f456",
              "status": "affected",
              "versionType": "git",
              "lessThan": "452950461241dfed8b1d32e94b227db38c99c5af"
            },
            {
              "version": "cb85f4d23f794e24127f3e562cb3b54b0803f456",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ada23457d4748d6e9c36c6f871fc29a6f558c48c"
            },
            {
              "version": "cb85f4d23f794e24127f3e562cb3b54b0803f456",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e4223231b6860141813637a6413c2371ae4d6fa8"
            },
            {
              "version": "cb85f4d23f794e24127f3e562cb3b54b0803f456",
              "status": "affected",
              "versionType": "git",
              "lessThan": "32f7ab52875ec7f800ca67e7176e5743a84baddf"
            },
            {
              "version": "cb85f4d23f794e24127f3e562cb3b54b0803f456",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a897682793eba5de51ee6f3152760374afa629cf"
            },
            {
              "version": "eb799e163dc2bc1ea0a4820b66f79d32a5e907df",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "bcc1eab71a67c46b9e24544ac7923f44444174ce",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "8cf20fb73e73a4c4df0328b5297842c5ef34fdd9",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "e5d25003d059649e18a249635ed5ca7a7b1de5ad",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "69f8a7991fd93c49096ddd11574db3e7df238b7b",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "4.9.215",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.10"
            },
            {
              "version": "4.14.172",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.15"
            },
            {
              "version": "4.19.107",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.20"
            },
            {
              "version": "5.4.23",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.5"
            },
            {
              "version": "5.5.7",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.6"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.6",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.6"
            },
            {
              "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": "*"
            }
          ]
        }
      ]
    }
  }
}