{
  "cveId": "CVE-2021-39656",
  "url": "https://patchblox.com/security/cve/CVE-2021-39656",
  "summary": "CVE-2021-39656 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-39656, released December 15, 2021. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In __configfs_open_file of file.c, there is a possible use-after-free due to improper locking",
  "description": "In __configfs_open_file of file.c, there is a possible use-after-free due to improper locking. This could lead to local escalation of privilege in the kernel with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-174049066References: Upstream kernel",
  "published": "2021-12-15T19:15:15Z",
  "severity": "medium",
  "cvss": 6.7,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00124,
  "epssPercentile": 0.02157,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.10.24-1",
      "fix": "DEBIAN-CVE-2021-39656",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-39656",
      "released": "2021-12-15T19:15:15Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.10.24-1",
      "fix": "DEBIAN-CVE-2021-39656",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-39656",
      "released": "2021-12-15T19:15:15Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.10.24-1",
      "fix": "DEBIAN-CVE-2021-39656",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-39656",
      "released": "2021-12-15T19:15:15Z"
    }
  ],
  "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"
  }
}