{
  "cveId": "CVE-2021-45868",
  "url": "https://patchblox.com/security/cve/CVE-2021-45868",
  "summary": "CVE-2021-45868 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-45868, released March 18, 2022. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel before 5.15.3, fs/quota/quota_tree.c does not validate the block number in the quota tree (on disk)",
  "description": "In the Linux kernel before 5.15.3, fs/quota/quota_tree.c does not validate the block number in the quota tree (on disk). This can, for example, lead to a kernel/locking/rwsem.c use-after-free if there is a corrupted quota file.",
  "published": "2022-03-18T07:15:06Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
  "epss": 0.01339,
  "epssPercentile": 0.7146,
  "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-2021-45868",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-45868",
      "released": "2022-03-18T07:15:06Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.15.3-1",
      "fix": "DEBIAN-CVE-2021-45868",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-45868",
      "released": "2022-03-18T07:15:06Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.15.3-1",
      "fix": "DEBIAN-CVE-2021-45868",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-45868",
      "released": "2022-03-18T07:15:06Z"
    }
  ],
  "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"
  }
}