CVE-2024-43818

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.6.50

Description The issue is related to the Advanced Sound Architecture (ASoC) component in the Linux kernel, specifically with the acpi get first physical node() function, which can return NULL under certain conditions, such as when there is no device, an ACPI table error, or a reference count drop to 0. The existing check only emits an error message but does not perform a return, resulting in a NULL pointer being passed to devm acpi dev add driver gpios(), where it is dereferenced. This error handling has been adjusted by adding an error code return.

Recommendations Update to Linux kernel version 6.6.50 or later to resolve the issue. As a temporary workaround, consider disabling the devm acpi dev add driver gpios() function until a patch is available. Restrict access to the vulnerable acpi get first physical node() function to minimize the risk of exploitation.