{
  "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-2021-47475",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47475",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-05-22T08:19:29.423Z",
    "updatedAt": "2026-05-11T13:55:24.292Z",
    "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: vmk80xx: fix transfer-buffer overflows",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ncomedi: vmk80xx: fix transfer-buffer overflows\n\nThe driver uses endpoint-sized USB transfer buffers but up until\nrecently had no sanity checks on the sizes.\n\nCommit e1f13c879a7c (\"staging: comedi: check validity of wMaxPacketSize\nof usb endpoints found\") inadvertently fixed NULL-pointer dereferences\nwhen accessing the transfer buffers in case a malicious device has a\nzero wMaxPacketSize.\n\nMake sure to allocate buffers large enough to handle also the other\naccesses that are done without a size check (e.g. byte 18 in\nvmk80xx_cnt_insn_read() for the VMK8061_MODEL) to avoid writing beyond\nthe buffers, for example, when doing descriptor fuzzing.\n\nThe original driver was for a low-speed device with 8-byte buffers.\nSupport was later added for a device that uses bulk transfers and is\npresumably a full-speed device with a maximum 64-byte wMaxPacketSize.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "985cafccbf9b7f862aa1c5ee566801e18b5161fb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5229159f1d052821007aff1a1beb7873eacf1a9f"
            },
            {
              "version": "985cafccbf9b7f862aa1c5ee566801e18b5161fb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ec85bcff4ed09260243d8f39faba99e1041718ba"
            },
            {
              "version": "985cafccbf9b7f862aa1c5ee566801e18b5161fb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "40d2a7e278e2e7c0a5fd7e997e7eb63945bf93f7"
            },
            {
              "version": "985cafccbf9b7f862aa1c5ee566801e18b5161fb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7a2021b896de1ad559d33b5c5cdd20b982242088"
            },
            {
              "version": "985cafccbf9b7f862aa1c5ee566801e18b5161fb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "199acd8c110e3ae62833c24f632b0bb1c9f012a9"
            },
            {
              "version": "985cafccbf9b7f862aa1c5ee566801e18b5161fb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "33d7a470730dfe7c9bfc8da84575cf2cedd60d00"
            },
            {
              "version": "985cafccbf9b7f862aa1c5ee566801e18b5161fb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "278484ae93297b1bb1ce755f9d3b6d95a48c7d47"
            },
            {
              "version": "985cafccbf9b7f862aa1c5ee566801e18b5161fb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "06ac746d57e6d32b062e220415c607b7e2e0fa50"
            },
            {
              "version": "985cafccbf9b7f862aa1c5ee566801e18b5161fb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a23461c47482fc232ffc9b819539d1f837adf2b1"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.31",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.31"
            },
            {
              "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": "*"
            }
          ]
        }
      ]
    }
  }
}