Januscape: Guest-to-Host Escape in KVM/x86 [CVE-2026-53359]
![Januscape: Guest-to-Host Escape in KVM/x86 [CVE-2026-53359]](/api/imagekit?u=https%3A%2F%2Fopengraph.githubassets.com%2Feaed9a9b57868bb034974b2baa8ab90804f5ba2795d43d183ee265cfe2962aa7%2FV4bel%2FJanuscape&w=3840&q=75)
Technical disclosure of 'Januscape,' a critical guest-to-host escape vulnerability in KVM/x86 environments. The vulnerability allows an attacker to break out of a virtual machine to the host kernel, affecting both Intel and AMD architectures.
Why it matters
Highlights a significant security risk for cloud providers and multi-tenant virtualization environments.
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.
Purely technical security disclosure with no political or social framing.
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