{
  "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-2026-45915",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-45915",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-05-27T12:17:30.699Z",
    "updatedAt": "2026-05-27T12:17:30.699Z",
    "importedAt": "2026-10-24T01:58:14.884Z",
    "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": "fat: avoid parent link count underflow in rmdir",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nfat: avoid parent link count underflow in rmdir\n\nCorrupted FAT images can leave a directory inode with an incorrect\ni_nlink (e.g. 2 even though subdirectories exist). rmdir then\nunconditionally calls drop_nlink(dir) and can drive i_nlink to 0,\ntriggering the WARN_ON in drop_nlink().\n\nAdd a sanity check in vfat_rmdir() and msdos_rmdir(): only drop the\nparent link count when it is at least 3, otherwise report a filesystem\nerror.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "9a53c3a783c2fa9b969628e65695c11c3e51e673",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7fe0de287e931e07cb96ecf1f449b2ebdb0e1115"
            },
            {
              "version": "9a53c3a783c2fa9b969628e65695c11c3e51e673",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9894c79fd9466612d0514be157b5c30cd93aa645"
            },
            {
              "version": "9a53c3a783c2fa9b969628e65695c11c3e51e673",
              "status": "affected",
              "versionType": "git",
              "lessThan": "cd569b87378b9c33ae13c23d6bb9d205d66f7c4b"
            },
            {
              "version": "9a53c3a783c2fa9b969628e65695c11c3e51e673",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d3b7ffa90f613938128432c7b2f35b7aa4bdd86b"
            },
            {
              "version": "9a53c3a783c2fa9b969628e65695c11c3e51e673",
              "status": "affected",
              "versionType": "git",
              "lessThan": "955c5d670b5ae07c78f4345e23a895638db96ce1"
            },
            {
              "version": "9a53c3a783c2fa9b969628e65695c11c3e51e673",
              "status": "affected",
              "versionType": "git",
              "lessThan": "17866f8a0822d414cb02e621cf003a7d04396ef8"
            },
            {
              "version": "9a53c3a783c2fa9b969628e65695c11c3e51e673",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d0bb592fa9def2bace90ac8926c0a1d6fa8c1aa0"
            },
            {
              "version": "9a53c3a783c2fa9b969628e65695c11c3e51e673",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8cafcb881364af5ef3a8b9fed4db254054033d8a"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.19",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.19"
            },
            {
              "version": "5.10.252",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.202",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.165",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.128",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.75",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.14",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "version": "7.0",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}