CVE-2024-49991

Name of the Vulnerable Software and Affected Versions: Linux kernel versions prior to 6.6.58

Description: The issue is related to the amdkfd free gtt mem function in the Linux kernel, where a pointer reference is not correctly passed to amdgpu bo unref, potentially causing a use-after-free bug. This occurs because amdgpu bo unref clears the local variable instead of the original pointer, which is not set to NULL. The estimated number of potentially affected devices worldwide is not specified. There is no information about real-world incidents where this issue was exploited.

Recommendations: For versions prior to 6.6.58, update to version 6.6.58 or later to resolve the issue. As a temporary workaround, consider restricting access to the drm/amdkfd module to minimize the risk of exploitation. Avoid using the amdgpu bo unref function with the amdkfd free gtt mem function until the issue is resolved.