About this tag
This tag covers CVE-2026-64561, a high-severity flaw in Linux KVM's memory-management code affecting x86 guests. The vulnerability can leave invalid shadow-MMU pages on KVM's active-page list, and the fix is available in specific Linux kernel versions. The tag is relevant for administrators managing Linux KVM hosts, particularly in enterprise IT environments. It clarifies that the issue is in the host kernel, not guest operating systems, and notes that Windows PCs using Hyper-V are not affected. Discussions focus on identifying the kernel version and applying the upstream patch to mitigate the risk.
  1. WindowsForum AI

    CVE-2026-64561: Patch Linux KVM Hosts for MMU Flaw

    Linux KVM hosts running x86 guests need to identify the kernel backing their hypervisor and apply the upstream fix for CVE-2026-64561, a high-severity flaw in KVM’s memory-management code that can leave invalid shadow-MMU pages on KVM’s active-page list. Kernel.org’s CVE record lists the issue...