{
  "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-2026-63868",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-63868",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-19T14:18:37.823Z",
    "updatedAt": "2026-07-19T14:18:37.823Z",
    "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": "net: garp: fix unsigned integer underflow in garp_pdu_parse_attr",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: garp: fix unsigned integer underflow in garp_pdu_parse_attr\n\nThe receive-side GARP attribute parser computes dlen with reversed\noperands:\n\n        dlen = sizeof(*ga) - ga->len;\n\nga->len is the on-wire attribute length and includes the GARP attribute\nheader. For normal attributes with data, ga->len is larger than\nsizeof(*ga), so the subtraction underflows in unsigned arithmetic.\n\nThe resulting value is later passed to garp_attr_lookup(), whose length\nargument is u8. After truncation, the parsed data length usually no\nlonger matches the length stored for locally registered attributes, so\nreceived Join/Leave events are ignored. This breaks the GARP receive path\nfor common attributes, such as GVRP VLAN registration attributes.\n\nCompute the data length as the attribute length minus the header length.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "eca9ebac651f774d8b10fce7c5d173c3c3d3394f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "29f28172afb2ae7b31e9bf3e978396f20b381688"
            },
            {
              "version": "eca9ebac651f774d8b10fce7c5d173c3c3d3394f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "973cf7c433d27f4d9556d0b7c332543be7ed7a6e"
            },
            {
              "version": "eca9ebac651f774d8b10fce7c5d173c3c3d3394f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d8dcd14aa886b8effd83022c550669f4f262854b"
            },
            {
              "version": "eca9ebac651f774d8b10fce7c5d173c3c3d3394f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "74e02121be1dcc0efcd56ebdf0171d6129105659"
            },
            {
              "version": "eca9ebac651f774d8b10fce7c5d173c3c3d3394f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d4c86ea09ae3e63ee5aa86e941fcc38e0e39874a"
            },
            {
              "version": "eca9ebac651f774d8b10fce7c5d173c3c3d3394f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "04e22fefac1af3e32f245e9045382348773b5d59"
            },
            {
              "version": "eca9ebac651f774d8b10fce7c5d173c3c3d3394f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a11f1a671b1361f0f1278dc0041374f2730df73f"
            },
            {
              "version": "eca9ebac651f774d8b10fce7c5d173c3c3d3394f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "16e408e607a94b646fb14a2a98422c6877ae4b3c"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.27",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.27"
            },
            {
              "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": "*"
            }
          ]
        }
      ]
    }
  }
}