ResolvedLinux kernel KVM (x86 shadow MMU)
Linux KVM Januscape (CVE-2026-53359): Guest-to-Host Escape
Linux KVM Januscape (CVE-2026-53359) is a use-after-free in KVM's shadow MMU. A guest VM can trigger it to crash or take over its x86 host on both Intel and AMD. This 16-year-old flaw was fixed in mainline on June 19, 2026.