GHSA-QCF3-QG3W-G99P

Vulnerability from github – Published: 2026-05-28 12:30 – Updated: 2026-05-28 12:30
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

wifi: rsi: fix kthread lifetime race between self-exit and external-stop

RSI driver use both self-exit(kthread_complete_and_exit) and external-stop (kthread_stop) when killing a kthread. Generally, kthread_stop() is called first, and in this case, no particular issues occur.

However, in rare instances where kthread_complete_and_exit() is called first and then kthread_stop() is called, a UAF occurs because the kthread object, which has already exited and been freed, is accessed again.

Therefore, to prevent this with minimal modification, you must remove kthread_stop() and change the code to wait until the self-exit operation is completed.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-46187"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-28T10:16:34Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rsi: fix kthread lifetime race between self-exit and external-stop\n\nRSI driver use both self-exit(kthread_complete_and_exit) and external-stop\n(kthread_stop) when killing a kthread. Generally, kthread_stop() is called\nfirst, and in this case, no particular issues occur.\n\nHowever, in rare instances where kthread_complete_and_exit() is called\nfirst and then kthread_stop() is called, a UAF occurs because the kthread\nobject, which has already exited and been freed, is accessed again.\n\nTherefore, to prevent this with minimal modification, you must remove\nkthread_stop() and change the code to wait until the self-exit operation\nis completed.",
  "id": "GHSA-qcf3-qg3w-g99p",
  "modified": "2026-05-28T12:30:32Z",
  "published": "2026-05-28T12:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46187"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/16d9f674c619838bdeae42abc0929c9c5477ea1f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4f4c9b13c485abd0a2d2c97f9db339d1dd8e147f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4f9a4ae8d2c198f01611ea376034c326ef43ab56"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/95fcb436586dc3c2983537d557ac05bbc6a027f3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/db57a1aa54ff68669781976e4edb045e09e2b65b"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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