{
  "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-2026-89476",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-89476",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-11T19:43:33.193Z",
    "updatedAt": "2026-10-19T08:47:25.179Z",
    "importedAt": "2026-10-24T01:58:35.090Z",
    "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": "sctp: fix stream->outcnt underflow on duplicate RECONF responses",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: fix stream->outcnt underflow on duplicate RECONF responses\n\nA cached RECONF chunk may contain more than one request parameter.  A\nduplicate response can therefore find and process the same ADD_OUT request\nagain while another parameter is still outstanding, rolling back outcnt\ntwice and possibly underflowing it.\n\nTrack outstanding request types as bits and clear each bit after its first\nresponse.  Later responses for the same request are then ignored.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "11ae76e67a179f25ae8f772d62a7ddf717b1cdf3",
              "status": "affected",
              "versionType": "git",
              "lessThan": "041f7df5a929d3e7435dd8387e8ea17f2d412b7d"
            },
            {
              "version": "11ae76e67a179f25ae8f772d62a7ddf717b1cdf3",
              "status": "affected",
              "versionType": "git",
              "lessThan": "59f61c39cb99ee1737bd742a20094fe5653389bb"
            },
            {
              "version": "11ae76e67a179f25ae8f772d62a7ddf717b1cdf3",
              "status": "affected",
              "versionType": "git",
              "lessThan": "793519e343867ee9a3e84f6cac07f81f2aec7b5d"
            },
            {
              "version": "11ae76e67a179f25ae8f772d62a7ddf717b1cdf3",
              "status": "affected",
              "versionType": "git",
              "lessThan": "092acd3c55a4077b00489064615d8d2d898daf91"
            },
            {
              "version": "11ae76e67a179f25ae8f772d62a7ddf717b1cdf3",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2d867663c563e8009257b9edf9c8ec75d9bbf19a"
            },
            {
              "version": "11ae76e67a179f25ae8f772d62a7ddf717b1cdf3",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d02a5794c3deedcb8476d017fcee2b7aaedab2e1"
            },
            {
              "version": "11ae76e67a179f25ae8f772d62a7ddf717b1cdf3",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8320cbd81bc21a1ca6ebdf70ad610ebc5ef1bd68"
            },
            {
              "version": "11ae76e67a179f25ae8f772d62a7ddf717b1cdf3",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3faf13aff243ca9f78d08b1a2956ef5a6fc77b6e"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.12",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.12"
            },
            {
              "version": "5.10.270",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.221",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.188",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.157",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.109",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.50",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}