{
  "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-2026-53269",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-53269",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-06-25T08:39:55.172Z",
    "updatedAt": "2026-10-15T01:23:10.609Z",
    "importedAt": "2026-10-24T01:58:20.586Z",
    "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: synproxy: add mutex to guard hook reference counting",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: synproxy: add mutex to guard hook reference counting\n\nAs the synproxy infrastructure register netfilter hooks on-demand when a\nuser adds the first iptables target or nftables expression, if done\nconcurrently they can race each other.\n\nIntroduce a mutex to serialize the refcount control blocks access from\nboth frontends. While a per namespace mutex might be more efficient, it\nis not needed for target/expression like SYNPROXY.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "ad49d86e07a497e834cb06f2b151dccd75f8e148",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0ec9ddc1bda261a2c57636c74c8b4e53000102c9"
            },
            {
              "version": "ad49d86e07a497e834cb06f2b151dccd75f8e148",
              "status": "affected",
              "versionType": "git",
              "lessThan": "56ffbe3a08c01dcdb0d6adee9ce1e535bfb3b389"
            },
            {
              "version": "ad49d86e07a497e834cb06f2b151dccd75f8e148",
              "status": "affected",
              "versionType": "git",
              "lessThan": "debc57b83d5b323df74bf010c8d50fe26ad2ed6b"
            },
            {
              "version": "ad49d86e07a497e834cb06f2b151dccd75f8e148",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0f8ba5e4c53d2e4a536aa68140beda9fe59b2f88"
            },
            {
              "version": "ad49d86e07a497e834cb06f2b151dccd75f8e148",
              "status": "affected",
              "versionType": "git",
              "lessThan": "640441348258220e78daed40528b85b8afcedab6"
            },
            {
              "version": "ad49d86e07a497e834cb06f2b151dccd75f8e148",
              "status": "affected",
              "versionType": "git",
              "lessThan": "aaf80701dc2f7a48fe543961e21f8ca3924d587c"
            },
            {
              "version": "ad49d86e07a497e834cb06f2b151dccd75f8e148",
              "status": "affected",
              "versionType": "git",
              "lessThan": "fbf0591275f50eae5733c3d7a8cd6c1e79933ffa"
            },
            {
              "version": "ad49d86e07a497e834cb06f2b151dccd75f8e148",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2fcba19caaeb2a33017459d3430f057967bb91b6"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.3",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.3"
            },
            {
              "version": "5.10.259",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.210",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.176",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.143",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.94",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.36",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.13",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}