{
  "cveId": "CVE-2021-4149",
  "url": "https://patchblox.com/security/cve/CVE-2021-4149",
  "summary": "CVE-2021-4149 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-4149, released March 23, 2022. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: A vulnerability was found in btrfs_alloc_tree_b in fs/btrfs/extent-tree.c in the Linux kernel due to an improper lock...",
  "description": "A vulnerability was found in btrfs_alloc_tree_b in fs/btrfs/extent-tree.c in the Linux kernel due to an improper lock operation in btrfs. In this flaw, a user with a local privilege may cause a denial of service (DOS) due to a deadlock problem.",
  "published": "2022-03-23T20:15:09Z",
  "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": 0.004,
  "epssPercentile": 0.34502,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.14.16-1",
      "fix": "DEBIAN-CVE-2021-4149",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-4149",
      "released": "2022-03-23T20:15:09Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.14.16-1",
      "fix": "DEBIAN-CVE-2021-4149",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-4149",
      "released": "2022-03-23T20:15:09Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.14.16-1",
      "fix": "DEBIAN-CVE-2021-4149",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-4149",
      "released": "2022-03-23T20:15:09Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}