{
  "cveId": "CVE-2021-47476",
  "url": "https://patchblox.com/security/cve/CVE-2021-47476",
  "summary": "CVE-2021-47476 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47476, released May 22, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  comedi: ni_usb6501: fix NULL-deref in command pa...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  comedi: ni_usb6501: fix NULL-deref in command paths  The driver uses endpoint-sized USB transfer buffers but had no sanity checks on the sizes. This can lead to zero-size-pointer dereferences or overflowed transfer buffers in ni6501_port_command() and ni6501_counter_command() if a (malicious) device has smaller max-packet sizes than expected (or when doing descriptor fuzz testing).  Add the missing sanity checks to probe().",
  "published": "2024-05-22T09:15:09Z",
  "severity": "medium",
  "cvss": 4.6,
  "cvssVector": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00388,
  "epssPercentile": 0.33159,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.15.3-1",
      "fix": "DEBIAN-CVE-2021-47476",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47476",
      "released": "2024-05-22T09:15:09Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.15.3-1",
      "fix": "DEBIAN-CVE-2021-47476",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47476",
      "released": "2024-05-22T09:15:09Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.15.3-1",
      "fix": "DEBIAN-CVE-2021-47476",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47476",
      "released": "2024-05-22T09:15:09Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}