Search: CVE-2025-21991

A security update addresses an out-of-bounds vulnerability in the Linux kernel's x86 microcode for AMD processors on systems with CPU-less NUMA nodes (CVE-2025-21991). This vulnerability has been rated as moderate severity by Red Hat. The issue affects Red Hat Enterprise Linux 9 and related variants. A patch is available and should be applied, followed by a system reboot to activate the fix.