GHSA-G5X6-JRF2-H8QV

Vulnerability from github – Published: 2026-05-27 15:33 – Updated: 2026-05-27 15:33
VLAI
Details

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

net: qrtr: ns: Fix use-after-free in driver remove()

In the remove callback, if a packet arrives after destroy_workqueue() is called, but before sock_release(), the qrtr_ns_data_ready() callback will try to queue the work, causing use-after-free issue.

Fix this issue by saving the default 'sk_data_ready' callback during qrtr_ns_init() and use it to replace the qrtr_ns_data_ready() callback at the start of remove(). This ensures that even if a packet arrives after destroy_workqueue(), the work struct will not be dereferenced.

Note that it is also required to ensure that the RX threads are completed before destroying the workqueue, because the threads could be using the qrtr_ns_data_ready() callback.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-46047"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T14:17:24Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qrtr: ns: Fix use-after-free in driver remove()\n\nIn the remove callback, if a packet arrives after destroy_workqueue() is\ncalled, but before sock_release(), the qrtr_ns_data_ready() callback will\ntry to queue the work, causing use-after-free issue.\n\nFix this issue by saving the default \u0027sk_data_ready\u0027 callback during\nqrtr_ns_init() and use it to replace the qrtr_ns_data_ready() callback at\nthe start of remove(). This ensures that even if a packet arrives after\ndestroy_workqueue(), the work struct will not be dereferenced.\n\nNote that it is also required to ensure that the RX threads are completed\nbefore destroying the workqueue, because the threads could be using the\nqrtr_ns_data_ready() callback.",
  "id": "GHSA-g5x6-jrf2-h8qv",
  "modified": "2026-05-27T15:33:22Z",
  "published": "2026-05-27T15:33:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46047"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0f313eb6a8f6dffa491373cf3afab979fa1c02f4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2e127ceb1c415e246076d8e09e23e443a7a2038f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7809fea20c9404bfcfa6112ec08d1fe1d3520beb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/db3c60ec772de30acae92d560dfcc5258e58dbe8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f96779e916576e81430ebb326baff6e433fef8ae"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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