fkie_cve-2022-49951
Vulnerability from fkie_nvd
Published
2025-06-18 11:15
Modified
2025-11-14 18:58
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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/8b40c38e37492b5bdf8e95b46b5cca9517a9957aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d380d40930a674c520a5b55f3be1eb17dc634ebcPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel 6.0
linux linux_kernel 6.0
linux linux_kernel 6.0


To clipboard 

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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": "2025-11-14T18:58:19.223",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
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        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2025-06-18T11:15:22.167",
  "references": [
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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