Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2022-49951

Severity CVSS v4.0:
Pending analysis
Type:
CWE-416 Use After Free
Publication date:
18/06/2025
Last modified:
14/11/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> firmware_loader: Fix use-after-free during unregister<br /> <br /> In the following code within firmware_upload_unregister(), the call to<br /> device_unregister() could result in the dev_release function freeing the<br /> fw_upload_priv structure before it is dereferenced for the call to<br /> module_put(). This bug was found by the kernel test robot using<br /> CONFIG_KASAN while running the firmware selftests.<br /> <br /> device_unregister(&amp;fw_sysfs-&gt;dev);<br /> module_put(fw_upload_priv-&gt;module);<br /> <br /> The problem is fixed by copying fw_upload_priv-&gt;module to a local variable<br /> for use when calling device_unregister().

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
7.80
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.19 (including) 5.19.8 (excluding)
cpe:2.3:o:linux:linux_kernel:6.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0:rc3:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools