{
  "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-2026-23457",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-23457",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-04-03T15:15:38.193Z",
    "updatedAt": "2026-10-19T18:35:44.867Z",
    "importedAt": "2026-10-24T01:58:02.025Z",
    "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: nf_conntrack_sip: fix Content-Length u32 truncation in sip_help_tcp()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_sip: fix Content-Length u32 truncation in sip_help_tcp()\n\nsip_help_tcp() parses the SIP Content-Length header with\nsimple_strtoul(), which returns unsigned long, but stores the result in\nunsigned int clen.  On 64-bit systems, values exceeding UINT_MAX are\nsilently truncated before computing the SIP message boundary.\n\nFor example, Content-Length 4294967328 (2^32 + 32) is truncated to 32,\ncausing the parser to miscalculate where the current message ends.  The\nloop then treats trailing data in the TCP segment as a second SIP\nmessage and processes it through the SDP parser.\n\nFix this by changing clen to unsigned long to match the return type of\nsimple_strtoul(), and reject Content-Length values that exceed the\nremaining TCP payload length.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "f5b321bd37fbec9188feb1f721ab46a5ac0b35da",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ed81b6a7012485acdb9c6c80735a0b7d8e5e1873"
            },
            {
              "version": "f5b321bd37fbec9188feb1f721ab46a5ac0b35da",
              "status": "affected",
              "versionType": "git",
              "lessThan": "cd1b7403ec835f8a0b3f1f7e68ac26af2cb1e42f"
            },
            {
              "version": "f5b321bd37fbec9188feb1f721ab46a5ac0b35da",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b75209debb9adab287b3caa982f77788c1e15027"
            },
            {
              "version": "f5b321bd37fbec9188feb1f721ab46a5ac0b35da",
              "status": "affected",
              "versionType": "git",
              "lessThan": "528b4509c9dfc272e2e92d811915e5211650d383"
            },
            {
              "version": "f5b321bd37fbec9188feb1f721ab46a5ac0b35da",
              "status": "affected",
              "versionType": "git",
              "lessThan": "75fcaee5170e7dbbee778927134ef2e9568b4659"
            },
            {
              "version": "f5b321bd37fbec9188feb1f721ab46a5ac0b35da",
              "status": "affected",
              "versionType": "git",
              "lessThan": "865dba58958c3a86786f89a501971ab0e3ec6ba9"
            },
            {
              "version": "f5b321bd37fbec9188feb1f721ab46a5ac0b35da",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d4f17256544cc37f6534a14a27a9dec3540c2015"
            },
            {
              "version": "f5b321bd37fbec9188feb1f721ab46a5ac0b35da",
              "status": "affected",
              "versionType": "git",
              "lessThan": "fbce58e719a17aa215c724473fd5baaa4a8dc57c"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.34",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.34"
            },
            {
              "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": "6.18.20",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19.10",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "version": "7.0",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}