{
  "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-2025-39764",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-39764",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-09-11T16:52:32.060Z",
    "updatedAt": "2026-10-15T01:08:12.652Z",
    "importedAt": "2026-10-24T01:57:34.152Z",
    "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": "netfilter: ctnetlink: remove refcounting in expectation dumpers",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ctnetlink: remove refcounting in expectation dumpers\n\nSame pattern as previous patch: do not keep the expectation object\nalive via refcount, only store a cookie value and then use that\nas the skip hint for dump resumption.\n\nAFAICS this has the same issue as the one resolved in the conntrack\ndumper, when we do\n  if (!refcount_inc_not_zero(&exp->use))\n\nto increment the refcount, there is a chance that exp == last, which\ncauses a double-increment of the refcount and subsequent memory leak.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "cf6994c2b9812a9f02b99e89df411ffc5db9c779",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b05500444b8eb97644efdd180839a04a706be97c"
            },
            {
              "version": "cf6994c2b9812a9f02b99e89df411ffc5db9c779",
              "status": "affected",
              "versionType": "git",
              "lessThan": "bada48ad5b0590e318d0f79636ff62a2ef9f4955"
            },
            {
              "version": "cf6994c2b9812a9f02b99e89df411ffc5db9c779",
              "status": "affected",
              "versionType": "git",
              "lessThan": "64b7684042246e3238464c66894e30ba30c7e851"
            },
            {
              "version": "cf6994c2b9812a9f02b99e89df411ffc5db9c779",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9e5021a906532ca16e2aac69c0607711e1c70b1f"
            },
            {
              "version": "cf6994c2b9812a9f02b99e89df411ffc5db9c779",
              "status": "affected",
              "versionType": "git",
              "lessThan": "078d33c95bf534d37aa04269d1ae6158e20082d5"
            },
            {
              "version": "cf6994c2b9812a9f02b99e89df411ffc5db9c779",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a4d634ded4d3d400f115d84f654f316f249531c9"
            },
            {
              "version": "cf6994c2b9812a9f02b99e89df411ffc5db9c779",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1492e3dcb2be3aa46d1963da96aa9593e4e4db5a"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.23",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.23"
            },
            {
              "version": "5.10.253",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.203",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.167",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.130",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.78",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.16.2",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.16.*"
            },
            {
              "version": "6.17",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}