This document describes the Januscape (CVE-2026-53359) vulnerability discovered and reported by Hyunwoo Kim (@v4bel). It is a KVM escape vulnerability that lets a guest escape to the host in a KVM/x86 environment. To the best of public knowledge, this is the first guest-to-host exploit research triggerable on both Intel and AMD rather than being limited to a single architecture.

• https://github.com/V4bel/Januscape