fkie_cve-2022-49951
Vulnerability from fkie_nvd
Published
2025-06-18 11:15
Modified
2025-06-18 13:46
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: firmware_loader: Fix use-after-free during unregister In the following code within firmware_upload_unregister(), the call to device_unregister() could result in the dev_release function freeing the fw_upload_priv structure before it is dereferenced for the call to module_put(). This bug was found by the kernel test robot using CONFIG_KASAN while running the firmware selftests. device_unregister(&fw_sysfs->dev); module_put(fw_upload_priv->module); The problem is fixed by copying fw_upload_priv->module to a local variable for use when calling device_unregister().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8b40c38e37492b5bdf8e95b46b5cca9517a9957a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d380d40930a674c520a5b55f3be1eb17dc634ebc
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\nfirmware_loader: Fix use-after-free during unregister\n\nIn the following code within firmware_upload_unregister(), the call to\ndevice_unregister() could result in the dev_release function freeing the\nfw_upload_priv structure before it is dereferenced for the call to\nmodule_put(). This bug was found by the kernel test robot using\nCONFIG_KASAN while running the firmware selftests.\n\n  device_unregister(\u0026fw_sysfs-\u003edev);\n  module_put(fw_upload_priv-\u003emodule);\n\nThe problem is fixed by copying fw_upload_priv-\u003emodule to a local variable\nfor use when calling device_unregister()."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: firmware_loader: Se corrige el error \"use-after-free\" durante la anulaci\u00f3n del registro. En el siguiente c\u00f3digo, dentro de firmware_upload_unregister(), la llamada a device_unregister() podr\u00eda provocar que la funci\u00f3n dev_release libere la estructura fw_upload_priv antes de que se desreferenciara para la llamada a module_put(). Este error fue detectado por el robot de pruebas del kernel mediante CONFIG_KASAN al ejecutar las autopruebas del firmware. device_unregister(\u0026amp;fw_sysfs-\u0026gt;dev); module_put(fw_upload_priv-\u0026gt;module); El problema se corrige copiando fw_upload_priv-\u0026gt;module a una variable local para su uso al llamar a device_unregister()."
    }
  ],
  "id": "CVE-2022-49951",
  "lastModified": "2025-06-18T13:46:52.973",
  "metrics": {},
  "published": "2025-06-18T11:15:22.167",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8b40c38e37492b5bdf8e95b46b5cca9517a9957a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d380d40930a674c520a5b55f3be1eb17dc634ebc"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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