{
  "cveId": "CVE-2021-47339",
  "url": "https://patchblox.com/security/cve/CVE-2021-47339",
  "summary": "CVE-2021-47339 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47339, released May 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  media: v4l2-core: explicitly clear ioctl input d...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  media: v4l2-core: explicitly clear ioctl input data  As seen from a recent syzbot bug report, mistakes in the compat ioctl implementation can lead to uninitialized kernel stack data getting used as input for driver ioctl handlers.  The reported bug is now fixed, but it\u0027s possible that other related bugs are still present or get added in the future. As the drivers need to check user input already, the possible impact is fairly low, but it might still cause an information leak.  To be on the safe side, always clear the entire ioctl buffer before calling the conversion handler functions that are meant to initialize them.",
  "published": "2024-05-21T15:15:20Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00236,
  "epssPercentile": 0.14606,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.14.6-1",
      "fix": "DEBIAN-CVE-2021-47339",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47339",
      "released": "2024-05-21T15:15:20Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.14.6-1",
      "fix": "DEBIAN-CVE-2021-47339",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47339",
      "released": "2024-05-21T15:15:20Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.14.6-1",
      "fix": "DEBIAN-CVE-2021-47339",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47339",
      "released": "2024-05-21T15:15:20Z"
    }
  ],
  "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"
  }
}