Usermode-Helper

Zapscape — KVM/x86 Shadow-MMU Recursive-Zap Guest-to-Host Escape (CVE-2026-64561)

Zapscape (CVE-2026-64561) is a use-after-free in the KVM/x86 shadow MMU that lets a guest which uses nested virtualization escape to the host and run commands as the host kernel (root). Using guest-side actions alone, an attacker makes KVM recursively zap a…