CVE-2022-49951

published 2025-06-18

CVE-2022-49951: In the Linux kernel, the following vulnerability has been resolved: firmware_loader: Fix use-after-free during unregister In the following code within…

Priority P3 40 high 7.8 CVSS 3.1

AV L AC L PR L UI N S U C H I H A H

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().

Affected

9 ranges

Vendor	Product	Version range	Fixed in
debian	linux	< linux 6.0.2-1 (bookworm)	linux 6.0.2-1 (bookworm)
linux	linux	—	—
linux	linux	>= 97730bbb242cde22b7140acd202ffd88823886c9 < d380d40930a674c520a5b55f3be1eb17dc634ebc	d380d40930a674c520a5b55f3be1eb17dc634ebc
linux	linux	>= 97730bbb242cde22b7140acd202ffd88823886c9 < 8b40c38e37492b5bdf8e95b46b5cca9517a9957a	8b40c38e37492b5bdf8e95b46b5cca9517a9957a
linux	linux_kernel	—	—
linux	linux_kernel	>= 0 < 6.0.2-1	6.0.2-1
linux	linux_kernel	>= 0 < 6.0.2-1	6.0.2-1
linux	linux_kernel	>= 0 < 6.0.2-1	6.0.2-1
linux	linux_kernel	>= 5.19 < 5.19.8	5.19.8

CVSS provenance

nvd v3.1 7.8 HIGH CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

osv 7.8 HIGH

vendor_debian 7.8 HIGH

vendor_redhat 7.8 HIGH

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CWE-416