{
  "cveId": "CVE-2021-46968",
  "url": "https://patchblox.com/security/cve/CVE-2021-46968",
  "summary": "CVE-2021-46968 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-46968, released February 27, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  s390/zcrypt: fix zcard and zqueue hot-unplug mem...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  s390/zcrypt: fix zcard and zqueue hot-unplug memleak  Tests with kvm and a kmemdebug kernel showed, that on hot unplug the zcard and zqueue structs for the unplugged card or queue are not properly freed because of a mismatch with get/put for the embedded kref counter.  This fix now adjusts the handling of the kref counters. With init the kref counter starts with 1. This initial value needs to drop to zero with the unregister of the card or queue to trigger the release and free the object.",
  "published": "2024-02-27T19:04:07Z",
  "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": 0.00222,
  "epssPercentile": 0.12859,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.10.38-1",
      "fix": "DEBIAN-CVE-2021-46968",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-46968",
      "released": "2024-02-27T19:04:07Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.10.38-1",
      "fix": "DEBIAN-CVE-2021-46968",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-46968",
      "released": "2024-02-27T19:04:07Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.10.38-1",
      "fix": "DEBIAN-CVE-2021-46968",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-46968",
      "released": "2024-02-27T19:04:07Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}