{
  "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-2026-68431",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-68431",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-08-12T00:07:17.216Z",
    "updatedAt": "2026-08-23T12:46:22.134Z",
    "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": "ksmbd: validate minimum PDU size for transform requests",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: validate minimum PDU size for transform requests\n\nThe receive path applies the minimum SMB2 PDU size check only when\nProtocolId is SMB2_PROTO_NUMBER. A packet carrying\nSMB2_TRANSFORM_PROTO_NUM bypasses the check even when the negotiated\ndialect does not provide transform handling.\n\nOn an SMB 2.1 connection, a short transform packet therefore reaches\ninit_smb2_rsp_hdr(), which interprets the request as a full SMB2 header\nand reads beyond the request allocation. The copied fields can then be\nreturned to the unauthenticated client.\n\nCompression transforms are converted to ordinary SMB2 messages before\nprotocol validation. After that conversion, validate ordinary SMB2\nrequests against SMB2_MIN_SUPPORTED_PDU_SIZE and require encryption\ntransform requests to contain both a transform header and an SMB2\nheader. This rejects truncated requests before work allocation.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "df3a4518aee64f21bcafa891105b468413f27431",
              "status": "affected",
              "versionType": "git",
              "lessThan": "22f1aa35b87e471cc31b35b74451f46630863b12"
            },
            {
              "version": "543c12c2644e772caa6880662c2a852cfdc5a10c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "928dda88d0e13fbca381255028f65b244343a4ea"
            },
            {
              "version": "368ba06881c395f1c9a7ba22203cf8d78b4addc0",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d8e5c5672724b8f3c4c099d2cf60239c996e5424"
            },
            {
              "version": "368ba06881c395f1c9a7ba22203cf8d78b4addc0",
              "status": "affected",
              "versionType": "git",
              "lessThan": "32e486b70c256d5ef4baa5a2936ade2fea50e8eb"
            },
            {
              "version": "368ba06881c395f1c9a7ba22203cf8d78b4addc0",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d9e9753dfd43bd27c956578df7804a3c90b80fdc"
            },
            {
              "version": "368ba06881c395f1c9a7ba22203cf8d78b4addc0",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b62c510f59803f82f9b4c76ead2a56833b2984c7"
            },
            {
              "version": "368ba06881c395f1c9a7ba22203cf8d78b4addc0",
              "status": "affected",
              "versionType": "git",
              "lessThan": "cfc0b8e5080aec87700774e8568765eaa4b7b92b"
            },
            {
              "version": "e9cb7be2fcbaee9e808b729e92948d38d52e5add",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.15.145",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15.217"
            },
            {
              "version": "6.1.34",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.1.184"
            },
            {
              "version": "6.3.8",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.4"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.4",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.4"
            },
            {
              "version": "5.15.217",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.184",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.153",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.105",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.46",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1.6",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}