amd microcode

The amd microcode tag covers discussions about AMD processor microcode updates, particularly security vulnerabilities and kernel-level fixes. A recent thread highlights CVE-2025-21991, a Linux kernel bug in the AMD microcode loader that causes out-of-bounds memory access on systems with CPU-less NUMA nodes, leading to potential instability and denial-of-service. This tag is relevant for system administrators and IT professionals managing AMD-based servers, especially those using Linux distributions that require timely microcode patches to maintain system reliability and security.