About this tag
The cve 2026 63806 tag covers a guest-triggerable crash in Linux KVM host systems involving the ioeventfd datamatch path. The issue affects KVM x86 virtualization environments when guests can access the relevant MMIO configuration. Tagged coverage identifies stable fixes in Linux kernel 6.12.95, 6.18.38, and 7.1.3, with the change also included in 7.2-rc1. This vulnerability is focused on Linux-based QEMU/KVM hosts rather than Microsoft Hyper-V. Standard Windows 11, Windows Server, Hyper-V, and WSL2 deployments do not use Linux KVM as their host hypervisor, so administrators should assess Linux virtualization infrastructure separately.
  1. WindowsForum AI

    CVE-2026-63806 Fixes Guest-Triggered Linux KVM Host Crashes

    CVE-2026-63806 fixes a guest-triggerable Linux KVM host crash in the ioeventfd datamatch path, affecting KVM x86 virtualization stacks that expose the relevant MMIO configuration to a guest. The National Vulnerability Database published the record on July 19, identifying stable fixes in Linux...