{
  "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-2021-47477",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47477",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-05-22T08:19:30.860Z",
    "updatedAt": "2026-05-11T13:55:26.662Z",
    "importedAt": "2026-10-24T01:56:36.661Z",
    "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": "comedi: dt9812: fix DMA buffers on stack",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ncomedi: dt9812: fix DMA buffers on stack\n\nUSB transfer buffers are typically mapped for DMA and must not be\nallocated on the stack or transfers will fail.\n\nAllocate proper transfer buffers in the various command helpers and\nreturn an error on short transfers instead of acting on random stack\ndata.\n\nNote that this also fixes a stack info leak on systems where DMA is not\nused as 32 bytes are always sent to the device regardless of how short\nthe command is.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "63274cd7d38a3322d90b66a5bc976de1fb899051",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a6af69768d5cb4b2528946d53be5fa19ade37723"
            },
            {
              "version": "63274cd7d38a3322d90b66a5bc976de1fb899051",
              "status": "affected",
              "versionType": "git",
              "lessThan": "365a346cda82f51d835c49136a00a9df8a78c7f2"
            },
            {
              "version": "63274cd7d38a3322d90b66a5bc976de1fb899051",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8a52bc480992c7c9da3ebfea456af731f50a4b97"
            },
            {
              "version": "63274cd7d38a3322d90b66a5bc976de1fb899051",
              "status": "affected",
              "versionType": "git",
              "lessThan": "39ea61037ae78f14fa121228dd962ea3280eacf3"
            },
            {
              "version": "63274cd7d38a3322d90b66a5bc976de1fb899051",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3efb7af8ac437085b6c776e5b54830b149d86efe"
            },
            {
              "version": "63274cd7d38a3322d90b66a5bc976de1fb899051",
              "status": "affected",
              "versionType": "git",
              "lessThan": "786f5b03450454557ff858a8bead5d7c0cbf78d6"
            },
            {
              "version": "63274cd7d38a3322d90b66a5bc976de1fb899051",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3ac273d154d634e2034508a14db82a95d7ad12ed"
            },
            {
              "version": "63274cd7d38a3322d90b66a5bc976de1fb899051",
              "status": "affected",
              "versionType": "git",
              "lessThan": "20cebb8b620dc987e55ddc46801de986e081757e"
            },
            {
              "version": "63274cd7d38a3322d90b66a5bc976de1fb899051",
              "status": "affected",
              "versionType": "git",
              "lessThan": "536de747bc48262225889a533db6650731ab25d3"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.29",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.29"
            },
            {
              "version": "4.4.292",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.4.*"
            },
            {
              "version": "4.9.290",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.9.*"
            },
            {
              "version": "4.14.255",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.14.*"
            },
            {
              "version": "4.19.217",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.159",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.79",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.14.18",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.14.*"
            },
            {
              "version": "5.15.2",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "5.16",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}