{
  "cveId": "CVE-2021-47475",
  "url": "https://patchblox.com/security/cve/CVE-2021-47475",
  "summary": "CVE-2021-47475 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47475, released May 22, 2024. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  comedi: vmk80xx: fix transfer-buffer overflows...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  comedi: vmk80xx: fix transfer-buffer overflows  The driver uses endpoint-sized USB transfer buffers but up until recently had no sanity checks on the sizes.  Commit e1f13c879a7c (\u0022staging: comedi: check validity of wMaxPacketSize of usb endpoints found\u0022) inadvertently fixed NULL-pointer dereferences when accessing the transfer buffers in case a malicious device has a zero wMaxPacketSize.  Make sure to allocate buffers large enough to handle also the other accesses that are done without a size check (e.g. byte 18 in vmk80xx_cnt_insn_read() for the VMK8061_MODEL) to avoid writing beyond the buffers, for example, when doing descriptor fuzzing.  The original driver was for a low-speed device with 8-byte buffers. Support was later added for a device that uses bulk transfers and is presumably a full-speed device with a maximum 64-byte wMaxPacketSize.",
  "published": "2024-05-22T09:15:09Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00259,
  "epssPercentile": 0.17629,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.15.3-1",
      "fix": "DEBIAN-CVE-2021-47475",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47475",
      "released": "2024-05-22T09:15:09Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.15.3-1",
      "fix": "DEBIAN-CVE-2021-47475",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47475",
      "released": "2024-05-22T09:15:09Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.15.3-1",
      "fix": "DEBIAN-CVE-2021-47475",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47475",
      "released": "2024-05-22T09:15:09Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}