{
  "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-2026-89653",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-89653",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-11T19:45:43.261Z",
    "updatedAt": "2026-10-19T08:50:24.862Z",
    "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": "ceph: reject export_targets ranks >= CEPH_MAX_MDS in mdsmap decode",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nceph: reject export_targets ranks >= CEPH_MAX_MDS in mdsmap decode\n\nMDSMap export_targets entries are monitor controlled. check_new_map()\nuses each entry as a bit number in a fixed stack bitmap, so a rank\noutside the protocol namespace can make set_bit() write past the end of\nthe array.\n\nReject ranks outside CEPH_MAX_MDS while decoding the map. Do not\nvalidate against possible_max_rank here because maps may legitimately\nreference ranks beyond a temporarily reduced max_mds.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "d517b3983dd3106ca92d6c5d0d09415a4a09481c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3740c88ca9cb2210a8dbdd55ea4cec119fbe86fe"
            },
            {
              "version": "d517b3983dd3106ca92d6c5d0d09415a4a09481c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8c823bbab3c24e657469a84db96902ba82d4e8bb"
            },
            {
              "version": "d517b3983dd3106ca92d6c5d0d09415a4a09481c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c4addccd05bacbef2144b4db14853d0308a218ac"
            },
            {
              "version": "d517b3983dd3106ca92d6c5d0d09415a4a09481c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "736adee11af36e407ed902264f8b2fb5cf94b62f"
            },
            {
              "version": "d517b3983dd3106ca92d6c5d0d09415a4a09481c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4d298880f82c42383b36946bafde7ccf4d804c9b"
            },
            {
              "version": "d517b3983dd3106ca92d6c5d0d09415a4a09481c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "96c3f5fbb0d5386e7111426f047f98cec4586674"
            },
            {
              "version": "d517b3983dd3106ca92d6c5d0d09415a4a09481c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "aedc9053d909508a5f56c3f49f885fc030df4730"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.15",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.15"
            },
            {
              "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": "6.12.109",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.50",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}