{
  "cveId": "CVE-2021-47163",
  "url": "https://patchblox.com/security/cve/CVE-2021-47163",
  "summary": "CVE-2021-47163 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47163, released March 25, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  tipc: wait and exit until all work queues are do...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  tipc: wait and exit until all work queues are done  On some host, a crash could be triggered simply by repeating these commands several times:    # modprobe tipc   # tipc bearer enable media udp name UDP1 localip 127.0.0.1   # rmmod tipc    [] BUG: unable to handle kernel paging request at ffffffffc096bb00   [] Workqueue: events 0xffffffffc096bb00   [] Call Trace:   []  ? process_one_work\u002B0x1a7/0x360   []  ? worker_thread\u002B0x30/0x390   []  ? create_worker\u002B0x1a0/0x1a0   []  ? kthread\u002B0x116/0x130   []  ? kthread_flush_work_fn\u002B0x10/0x10   []  ? ret_from_fork\u002B0x35/0x40  When removing the TIPC module, the UDP tunnel sock will be delayed to release in a work queue as sock_release() can\u0027t be done in rtnl_lock(). If the work queue is schedule to run after the TIPC module is removed, kernel will crash as the work queue function cleanup_beareri() code no longer exists when trying to invoke it.  To fix it, this patch introduce a member wq_count in tipc_net to track the numbers of work queues in schedule, and  wait and exit until all work queues are done in tipc_exit_net().",
  "published": "2024-03-25T10:15:08Z",
  "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": 0.00187,
  "epssPercentile": 0.08363,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.14.6-1",
      "fix": "DEBIAN-CVE-2021-47163",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47163",
      "released": "2024-03-25T10:15:08Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.14.6-1",
      "fix": "DEBIAN-CVE-2021-47163",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47163",
      "released": "2024-03-25T10:15:08Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.14.6-1",
      "fix": "DEBIAN-CVE-2021-47163",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47163",
      "released": "2024-03-25T10:15:08Z"
    }
  ],
  "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"
  }
}