{
  "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-2025-21766",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-21766",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-02-27T02:18:16.570Z",
    "updatedAt": "2026-10-15T21:51:52.707Z",
    "importedAt": "2026-10-24T01:57:29.455Z",
    "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": "ipv4: use RCU protection in __ip_rt_update_pmtu()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: use RCU protection in __ip_rt_update_pmtu()\n\n__ip_rt_update_pmtu() must use RCU protection to make\nsure the net structure it reads does not disappear.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "2fbc6e89b2f1403189e624cabaf73e189c5e50c6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ce3c6165fce0f06305c806696882a3ad4b90e33f"
            },
            {
              "version": "2fbc6e89b2f1403189e624cabaf73e189c5e50c6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ea07480b23225942208f1b754fea1e7ec486d37e"
            },
            {
              "version": "2fbc6e89b2f1403189e624cabaf73e189c5e50c6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9b1766d1ff5fe496aabe9fc5f4e34e53f35c11c4"
            },
            {
              "version": "2fbc6e89b2f1403189e624cabaf73e189c5e50c6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4583748b65dee4d61bd50a2214715b4237bc152a"
            },
            {
              "version": "2fbc6e89b2f1403189e624cabaf73e189c5e50c6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a39f61d212d822b3062d7f70fa0588e50e55664e"
            },
            {
              "version": "2fbc6e89b2f1403189e624cabaf73e189c5e50c6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "139512191bd06f1b496117c76372b2ce372c9a41"
            },
            {
              "version": "f415c264176e6095e9dee823e09c5bdd0ee0d337",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "98776a365da509ad923083ae54b38ee521c52742",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "860e2cc78c697c95bc749abb20047239fa1722ea",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "2b1be6c925cdf4638811765a9160796291494b89",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "4.14.200",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.15"
            },
            {
              "version": "4.19.148",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.20"
            },
            {
              "version": "5.4.68",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.5"
            },
            {
              "version": "5.8.12",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.9"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.9",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.9"
            },
            {
              "version": "5.15.179",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.129",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.79",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.16",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.13.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.13.*"
            },
            {
              "version": "6.14",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}