ghsa-m4jv-hg4p-x3x5
Vulnerability from github
Published
2025-06-18 12:30
Modified
2025-06-18 12:30
Details

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().

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49951"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-18T11:15:22Z",
    "severity": null
  },
  "details": "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().",
  "id": "GHSA-m4jv-hg4p-x3x5",
  "modified": "2025-06-18T12:30:37Z",
  "published": "2025-06-18T12:30:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49951"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8b40c38e37492b5bdf8e95b46b5cca9517a9957a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d380d40930a674c520a5b55f3be1eb17dc634ebc"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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