{
  "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-2026-63993",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-63993",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-19T14:56:13.218Z",
    "updatedAt": "2026-10-19T20:18:01.347Z",
    "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": "vxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu()\n\nskb_tunnel_check_pmtu() can change skb->head.\n\nReusing old_iph afer skb_tunnel_check_pmtu() can cause an UAF.\n\nUse instead ip_hdr(skb) as done in drivers/net/bareudp.c\nand drivers/net/geneve.c.\n\nFound by Sashiko.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6b8bfce9d2f774d2c2243e0248e03efb99bba6c0"
            },
            {
              "version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9257f56ac47ef1976bcd056cf986a9988eeec67a"
            },
            {
              "version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8d435d68d71fb875876b722f4136caf74f2f48bd"
            },
            {
              "version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "dc3bfa050f873371e745bdf478b1f5b738e5733d"
            },
            {
              "version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "609e63312c29aad18026a1d3222e123d4b6b0feb"
            },
            {
              "version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5303925e360527243b46a440a04667826bbc72b7"
            },
            {
              "version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a493efd4336cf19122ae0e4cbb3d31b32d70deea"
            },
            {
              "version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7d9ef0cb271555d8cf39fefe6c981e1493b25ecf"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.9",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.9"
            },
            {
              "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": "6.12.93",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.35",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.12",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}