{
  "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-2026-72502",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-72502",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-08-15T05:57:33.647Z",
    "updatedAt": "2026-10-16T18:55:27.761Z",
    "importedAt": "2026-10-24T01:58:25.636Z",
    "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": "tcp: ipv6: clamp default adverting MSS to avoid GSO_BY_FRAGS (0xFFFF)",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: ipv6: clamp default adverting MSS to avoid GSO_BY_FRAGS (0xFFFF)\n\nWhen MTU is large, ip6_default_advmss() can return IPV6_MAXPLEN (65535).\nThis is interpreted by TCP as mss_clamp, allowing the MSS to reach 65535.\n\nHowever, 0xFFFF is also used as a magic value GSO_BY_FRAGS in the kernel.\nIf a TCP packet with gso_size=0xFFFF is passed to skb_segment(), it will\nbe mistakenly treated as GSO_BY_FRAGS, leading to a NULL pointer\ndereference because local TCP packets do not use frag_list.\n\nFix this by returning min(IPV6_MAXPLEN, GSO_BY_FRAGS - 1) (65534) from\nip6_default_advmss() when MTU is large.\n\nAlso update the stale comment in ip6_default_advmss() which suggested\nthat IPV6_MAXPLEN is returned to mean \"any MSS\".",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "3953c46c3ac7eef31a9935427371c6f54a22f1ba",
              "status": "affected",
              "versionType": "git",
              "lessThan": "560b33b434e922ef97f9ff23aa2e909ef7aacd5c"
            },
            {
              "version": "3953c46c3ac7eef31a9935427371c6f54a22f1ba",
              "status": "affected",
              "versionType": "git",
              "lessThan": "21f69ac1879bb970588d5e7c12a96e6542f7c1a7"
            },
            {
              "version": "3953c46c3ac7eef31a9935427371c6f54a22f1ba",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c0db3dc2ac323b6c4b76adede3b355a9daa6dea8"
            },
            {
              "version": "3953c46c3ac7eef31a9935427371c6f54a22f1ba",
              "status": "affected",
              "versionType": "git",
              "lessThan": "572fff10819dfc359298d1f774839e76a4d96f93"
            },
            {
              "version": "3953c46c3ac7eef31a9935427371c6f54a22f1ba",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8e6214a530c03e341dc1b0a846c8f2b716b3551a"
            },
            {
              "version": "3953c46c3ac7eef31a9935427371c6f54a22f1ba",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d774cdbda6634a78d0f2baf201ee5a8c57f3bc0e"
            },
            {
              "version": "3953c46c3ac7eef31a9935427371c6f54a22f1ba",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a210791f33345aa87187f7d7a9f3b9b7f4a28e6d"
            },
            {
              "version": "3953c46c3ac7eef31a9935427371c6f54a22f1ba",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2bf43d0e2e6a27d52a7d624e2d6b9116972e8a22"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.8",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.8"
            },
            {
              "version": "5.10.261",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.212",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.178",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.145",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.97",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.40",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1.5",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}