{
  "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-2026-23455",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-23455",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-04-03T15:15:36.869Z",
    "updatedAt": "2026-10-19T18:35:44.554Z",
    "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_h323: check for zero length in DecodeQ931()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_h323: check for zero length in DecodeQ931()\n\nIn DecodeQ931(), the UserUserIE code path reads a 16-bit length from\nthe packet, then decrements it by 1 to skip the protocol discriminator\nbyte before passing it to DecodeH323_UserInformation(). If the encoded\nlength is 0, the decrement wraps to -1, which is then passed as a\nlarge value to the decoder, leading to an out-of-bounds read.\n\nAdd a check to ensure len is positive after the decrement.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "5e35941d990123f155b02d5663e51a24f816b6f3",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2121f5fbe88daff0f1fc5bc47d359426c74b86b0"
            },
            {
              "version": "5e35941d990123f155b02d5663e51a24f816b6f3",
              "status": "affected",
              "versionType": "git",
              "lessThan": "65fa92f79677858b14b9e4b7275f26639afe2710"
            },
            {
              "version": "5e35941d990123f155b02d5663e51a24f816b6f3",
              "status": "affected",
              "versionType": "git",
              "lessThan": "495e97af9e7249ee02b72bb1d0848a6efc3700f4"
            },
            {
              "version": "5e35941d990123f155b02d5663e51a24f816b6f3",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f5e4f4e4cdb75ec36802059a94195a31f193da60"
            },
            {
              "version": "5e35941d990123f155b02d5663e51a24f816b6f3",
              "status": "affected",
              "versionType": "git",
              "lessThan": "633e8f87dad32263f6a57dccdb873f042c062111"
            },
            {
              "version": "5e35941d990123f155b02d5663e51a24f816b6f3",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9d00fe7d6d7c5b5f1065a6e042b54f2e44bd6df8"
            },
            {
              "version": "5e35941d990123f155b02d5663e51a24f816b6f3",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b652b05d51003ac074b912684f9ec7486231717b"
            },
            {
              "version": "5e35941d990123f155b02d5663e51a24f816b6f3",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f173d0f4c0f689173f8cdac79991043a4a89bf66"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.17",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.17"
            },
            {
              "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": "*"
            }
          ]
        }
      ]
    }
  }
}