FKIE_CVE-2026-23221

Vulnerability from fkie_nvd - Published: 2026-02-18 16:22 - Updated: 2026-02-23 04:16
Severity ?
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/148891e95014b5dc5878acefa57f1940c281c431
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1d6bd6183e723a7b256ff34bbb5b498b5f4f2ec0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a2ae33e1c6361e960a4d00f7cf75d880b54f9528
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b1983840287303e0dfb401b1b6cecc5ea7471e90
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c424e72cfa67e7e1477035058a8a659f2c0ea637
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c71dfb7833db7af652ee8f65011f14c97c47405d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dd8ba8c0c3f3916d4ee1e3a09da9cd5caff5d227
Impacted products
Vendor Product Version
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "Se ha resuelto la siguiente vulnerabilidad en el kernel de Linux:\n\nbus: fsl-mc: correcci\u00f3n de uso despu\u00e9s de liberaci\u00f3n en driver_override_show()\n\nLa funci\u00f3n driver_override_show() lee la cadena driver_override sin mantener el device_lock. Sin embargo, driver_override_store() utiliza driver_set_override(), que modifica y libera la cadena mientras mantiene el device_lock.\n\nEsto puede resultar en un uso despu\u00e9s de liberaci\u00f3n concurrente si la cadena es liberada por la funci\u00f3n store mientras es le\u00edda por la funci\u00f3n show.\n\nSolucionar esto manteniendo el device_lock alrededor de la operaci\u00f3n de lectura."
    }
  ],
  "id": "CVE-2026-23221",
  "lastModified": "2026-02-23T04:16:00.437",
  "metrics": {},
  "published": "2026-02-18T16:22:31.820",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/148891e95014b5dc5878acefa57f1940c281c431"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1d6bd6183e723a7b256ff34bbb5b498b5f4f2ec0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a2ae33e1c6361e960a4d00f7cf75d880b54f9528"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b1983840287303e0dfb401b1b6cecc5ea7471e90"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c424e72cfa67e7e1477035058a8a659f2c0ea637"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c71dfb7833db7af652ee8f65011f14c97c47405d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/dd8ba8c0c3f3916d4ee1e3a09da9cd5caff5d227"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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