{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-50019",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-50019"
  ],
  "published": "2024-10-21T19:40:44Z",
  "summary": "kthread: unpark only parked kthread",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nkthread: unpark only parked kthread\n\nCalling into kthread unparking unconditionally is mostly harmless when\nthe kthread is already unparked. The wake up is then simply ignored\nbecause the target is not in TASK_PARKED state.\n\nHowever if the kthread is per CPU, the wake up is preceded by a call\nto kthread_bind() which expects the task to be inactive and in\nTASK_PARKED state, which obviously isn't the case if it is unparked.\n\nAs a result, calling kthread_stop() on an unparked per-cpu kthread\ntriggers such a warning:\n\n\tWARNING: CPU: 0 PID: 11 at kernel/kthread.c:525 __kthread_bind_mask kernel/kthread.c:525\n\t <TASK>\n\t kthread_stop+0x17a/0x630 kernel/kthread.c:707\n\t destroy_workqueue+0x136/0xc40 kernel/workqueue.c:5810\n\t wg_destruct+0x1e2/0x2e0 drivers/net/wireguard/device.c:257\n\t netdev_run_todo+0xe1a/0x1000 net/core/dev.c:10693\n\t default_device_exit_batch+0xa14/0xa90 net/core/dev.c:11769\n\t ops_exit_list net/core/net_namespace.c:178 [inline]\n\t cleanup_net+0x89d/0xcc0 net/core/net_namespace.c:640\n\t process_one_work kernel/workqueue.c:3231 [inline]\n\t process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312\n\t worker_thread+0x86d/0xd70 kernel/workqueue.c:3393\n\t kthread+0x2f0/0x390 kernel/kthread.c:389\n\t ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147\n\t ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244\n\t </TASK>\n\nFix this with skipping unecessary unparking while stopping a kthread.",
  "affected": [
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  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-50019"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/40a6e660d2a3a7a5cb99f0b8ff4fb41bad039f68"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8608196a155cb6cfae04d96b10a2652d0327e33f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/19a5029981c87c2ad0845e713837faa88f5d8e2b"
    },
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cda5423c1a1c906062ef235c940f249b97d9d135"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/214e01ad4ed7158cab66498810094fac5d09b218"
    }
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  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}