{
  "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-2024-40931",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-40931",
    "idYear": 2024,
    "status": "PUBLISHED",
    "publishedAt": "2024-07-12T12:25:09.778Z",
    "updatedAt": "2026-05-11T20:22:36.148Z",
    "importedAt": "2026-10-24T01:57:16.009Z",
    "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: ensure snd_una is properly initialized on connect",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: ensure snd_una is properly initialized on connect\n\nThis is strictly related to commit fb7a0d334894 (\"mptcp: ensure snd_nxt\nis properly initialized on connect\"). It turns out that syzkaller can\ntrigger the retransmit after fallback and before processing any other\nincoming packet - so that snd_una is still left uninitialized.\n\nAddress the issue explicitly initializing snd_una together with snd_nxt\nand write_seq.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "8fd738049ac3d67a937d36577763b47180aae1ad",
              "status": "affected",
              "versionType": "git",
              "lessThan": "208cd22ef5e57f82d38ec11c1a1703f9401d6dde"
            },
            {
              "version": "8fd738049ac3d67a937d36577763b47180aae1ad",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7b9c7fc8600b64a86e4b47b2d190bba380267726"
            },
            {
              "version": "8fd738049ac3d67a937d36577763b47180aae1ad",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f03c46eabb3a67bd2993e237ab5517f00a5f1813"
            },
            {
              "version": "8fd738049ac3d67a937d36577763b47180aae1ad",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f1f0a46f8bb8890b90ab7194f0a0c8fe2a3fb57f"
            },
            {
              "version": "8fd738049ac3d67a937d36577763b47180aae1ad",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ef473bf1dd7e8dd08bcc04b9e2d1bfed69a0a7ce"
            },
            {
              "version": "8fd738049ac3d67a937d36577763b47180aae1ad",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8031b58c3a9b1db3ef68b3bd749fbee2e1e1aaa3"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.9",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.9"
            },
            {
              "version": "5.10.221",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.162",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.95",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.35",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.9.6",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.9.*"
            },
            {
              "version": "6.10",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}