NULL Dereference in Linux Kernel ASoC Module Affecting AMD Sound Drivers

CVE-2025-40162

What is CVE-2025-40162?

In the Linux kernel's ASoC module, a vulnerability has been identified where the function devm_kasprintf() can return NULL due to memory allocation failures. The initial debug message attempts to access cpus->dai_name before verifying if the return value is NULL, leading to a potential NULL pointer dereference. This flaw emphasizes the need for secure coding practices, specifically the need to validate pointers before use.

To mitigate this issue, developers should ensure that they implement appropriate checks after memory allocations and follow best practices in error handling to prevent similar vulnerabilities in future code developments.

References