Vulnerability feed

Executive summary

This advisory covers a Linux kernel fix in the AMD graphics driver component (amdkfd) that corrects how debug trap state is cleaned up when a copy to user space fails. The advisory does not state how severe the issue is, and it does not describe a specific recommended action beyond the fix itself. Systems running affected Linux kernel builds that include the AMD GPU driver should apply the vendor's kernel update once available.

Technical summary

The flaw is an error-handling and state-unwinding defect in kfd_dbg_trap_enable() in drivers/gpu/drm/amd/amdkfd/kfd_debug.c. When copy_to_user() failed while copying runtime_info to userspace, the function returned -EFAULT without undoing the trap activation, debug_trap_enabled flag, extra process reference, and debug event file, which left inconsistent trap state and a refcount imbalance that could break later DISABLE or ENABLE operations. The fix deactivates the trap, releases the debug event file, decrements the debugged process count, clears debug_trap_enabled, and drops the process reference before returning. The advisory does not state a CVSS score, attack vector or privilege requirements, affected version ranges, fixed version numbers, workarounds, or exploitation status, and it gives no detection guidance.

Summaries are generated by AI from the linked advisory text. Confirm versions and fixes at the source.

Summarized from git.kernel.org/stable/c/01112e241e37f9a…f418d93ce2e0b87b7ee0

Score

No CVSS score published.

Affects

LinuxAMDLinuxLinux kernelamdkfd