{
  "cveId": "CVE-2021-47388",
  "url": "https://patchblox.com/security/cve/CVE-2021-47388",
  "summary": "CVE-2021-47388 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47388, released May 21, 2024. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  mac80211: fix use-after-free in CCMP/GCMP RX  Wh...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  mac80211: fix use-after-free in CCMP/GCMP RX  When PN checking is done in mac80211, for fragmentation we need to copy the PN to the RX struct so we can later use it to do a comparison, since commit bf30ca922a0c (\u0022mac80211: check defrag PN against current frame\u0022).  Unfortunately, in that commit I used the \u0027hdr\u0027 variable without it being necessarily valid, so use-after-free could occur if it was necessary to reallocate (parts of) the frame.  Fix this by reloading the variable after the code that results in the reallocations, if any.  This fixes https://bugzilla.kernel.org/show_bug.cgi?id=214401.",
  "published": "2024-05-21T15:15:24Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00342,
  "epssPercentile": 0.27857,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.14.12-1",
      "fix": "DEBIAN-CVE-2021-47388",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47388",
      "released": "2024-05-21T15:15:24Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.14.12-1",
      "fix": "DEBIAN-CVE-2021-47388",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47388",
      "released": "2024-05-21T15:15:24Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.14.12-1",
      "fix": "DEBIAN-CVE-2021-47388",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47388",
      "released": "2024-05-21T15:15:24Z"
    }
  ],
  "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"
  }
}