GHSA-JP99-8XC8-367M

Vulnerability from github – Published: 2026-02-18 18:30 – Updated: 2026-02-19 18:31
VLAI?
Details

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

bus: fsl-mc: fix use-after-free in driver_override_show()

The driver_override_show() function reads the driver_override string without holding the device_lock. However, driver_override_store() uses driver_set_override(), which modifies and frees the string while holding the device_lock.

This can result in a concurrent use-after-free if the string is freed by the store function while being read by the show function.

Fix this by holding the device_lock around the read operation.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-23221"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-02-18T16:22:31Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbus: fsl-mc: fix use-after-free in driver_override_show()\n\nThe driver_override_show() function reads the driver_override string\nwithout holding the device_lock. However, driver_override_store() uses\ndriver_set_override(), which modifies and frees the string while holding\nthe device_lock.\n\nThis can result in a concurrent use-after-free if the string is freed\nby the store function while being read by the show function.\n\nFix this by holding the device_lock around the read operation.",
  "id": "GHSA-jp99-8xc8-367m",
  "modified": "2026-02-19T18:31:44Z",
  "published": "2026-02-18T18:30:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23221"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1d6bd6183e723a7b256ff34bbb5b498b5f4f2ec0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a2ae33e1c6361e960a4d00f7cf75d880b54f9528"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b1983840287303e0dfb401b1b6cecc5ea7471e90"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c424e72cfa67e7e1477035058a8a659f2c0ea637"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c71dfb7833db7af652ee8f65011f14c97c47405d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dd8ba8c0c3f3916d4ee1e3a09da9cd5caff5d227"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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