{
  "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-2026-97568",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-97568",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-25T10:21:54.269Z",
    "updatedAt": "2026-10-19T09:09:31.044Z",
    "importedAt": "2026-10-24T01:58:41.756Z",
    "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": "mptcp: syncookies: remember the request backup flag",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: syncookies: remember the request backup flag\n\nInstead of using an uninitialised bit when copying the info in\nsubflow_ulp_clone().\n\nTo fix this, no need to extend the join_entry structure: backup is\ncoming from struct mptcp_subflow_request_sock, only one bit. Do the same\nhere by using one bit for both.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "1008f2bcbc8e461c1df3aebba30ac4f616ebe570",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c97fa2c7ada82d4cac1c6c00643238dc4c462f15"
            },
            {
              "version": "6f01f41b6a492ddf2da7609967cfaf57e7ca48a7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1668b34452009d27be3262646de748a3e48ffd51"
            },
            {
              "version": "09176f80995105c62939728fbad5c437d61e7ff4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b138e7dc719f0a3949de8bb6500b8cf1604eea06"
            },
            {
              "version": "8ed3e34c766e8264d5d2e0436f86c51604d6a8a7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "360d99258a6402cb8e49771460944f19f04d25b7"
            },
            {
              "version": "efd340bf3d7779a3a8ec954d8ec0fb8a10f24982",
              "status": "affected",
              "versionType": "git",
              "lessThan": "61178d0b85b4b1b53e78b06e89d018d22d102f88"
            },
            {
              "version": "efd340bf3d7779a3a8ec954d8ec0fb8a10f24982",
              "status": "affected",
              "versionType": "git",
              "lessThan": "00b2bd518911e0daab00f4749cce68c191ccebb4"
            },
            {
              "version": "efd340bf3d7779a3a8ec954d8ec0fb8a10f24982",
              "status": "affected",
              "versionType": "git",
              "lessThan": "06d649f9cd03a9f8e768a658b20acf8d2c8022e0"
            },
            {
              "version": "efd340bf3d7779a3a8ec954d8ec0fb8a10f24982",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b76c0e28b392620dfbaf92cdeedbf115820b44cb"
            },
            {
              "version": "73e2baa301ee3f62ff971e68877adeb37f98cc67",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.10.224",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.10.271"
            },
            {
              "version": "5.15.165",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15.222"
            },
            {
              "version": "6.1.104",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.1.189"
            },
            {
              "version": "6.6.45",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.6.158"
            },
            {
              "version": "6.10.4",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.11"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.11",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.11"
            },
            {
              "version": "5.10.271",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.222",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.189",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.158",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.111",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.53",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.7",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}