CVE-2022-49951 (GCVE-0-2022-49951)
Vulnerability from cvelistv5
Published
2025-06-18 11:00
Modified
2025-06-18 11:00
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
Impacted products
Vendor Product Version
Linux Linux Version: 97730bbb242cde22b7140acd202ffd88823886c9
Version: 97730bbb242cde22b7140acd202ffd88823886c9
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          "programFiles": [
            "drivers/base/firmware_loader/sysfs_upload.c"
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          "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()."
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      "providerMetadata": {
        "dateUpdated": "2025-06-18T11:00:14.694Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/8b40c38e37492b5bdf8e95b46b5cca9517a9957a"
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      "title": "firmware_loader: Fix use-after-free during unregister",
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    "datePublished": "2025-06-18T11:00:14.694Z",
    "dateReserved": "2025-06-18T10:57:27.382Z",
    "dateUpdated": "2025-06-18T11:00:14.694Z",
    "state": "PUBLISHED"
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}


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