{
  "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-2026-31478",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-31478",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-04-22T13:54:06.157Z",
    "updatedAt": "2026-10-19T18:45:53.152Z",
    "importedAt": "2026-10-24T01:58:02.025Z",
    "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: replace hardcoded hdr2_len with offsetof() in smb2_calc_max_out_buf_len()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: replace hardcoded hdr2_len with offsetof() in smb2_calc_max_out_buf_len()\n\nAfter this commit (e2b76ab8b5c9 \"ksmbd: add support for read compound\"),\nresponse buffer management was changed to use dynamic iov array.\nIn the new design, smb2_calc_max_out_buf_len() expects the second\nargument (hdr2_len) to be the offset of ->Buffer field in the\nresponse structure, not a hardcoded magic number.\nFix the remaining call sites to use the correct offsetof() value.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "f2283680a80571ca82d710bc6ecd8f8beac67d63",
              "status": "affected",
              "versionType": "git",
              "lessThan": "70b4c414889492c522b6e4331562360f49be2361"
            },
            {
              "version": "9f297df20d93411c0b4ddad7f88ba04a7cd36e77",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9a7166f0ef8cbb7bb48dd05e2471d995566003f5"
            },
            {
              "version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c3a89e3ec1ccf64fa6a34e391e1581ebbcba8683"
            },
            {
              "version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6aef1765d6807e0f027cd87f6ac973eb0879a46d"
            },
            {
              "version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "80824c7e527b70cf9039534e60aff592e8f209d1"
            },
            {
              "version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4cb537ae4f37d7d0f617815ed4bed7173fb50861"
            },
            {
              "version": "e2b76ab8b5c9327ab2dae6da05d0752eb2f4771d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0e55f63dd08f09651d39e1b709a91705a8a0ddcb"
            },
            {
              "version": "5.15.145",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15.203"
            },
            {
              "version": "6.1.71",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.1.168"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.6",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.6"
            },
            {
              "version": "5.15.203",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.168",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.131",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.80",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.21",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19.11",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "version": "7.0",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}