Linux KVM Escape Vulnerability Disclosed
rickasaurus · x · 2026-07-13
A high-severity vulnerability named Januscape (CVE-2026-53359) has been disclosed in Linux KVM, affecting Intel and AMD x86 systems.
Key points:
- This 16-year-old bug allows a root user inside a guest VM to escape to the host machine.
- A public PoC has emerged, which can crash the host.
- Canonical stated that patched kernels for Ubuntu versions are still pending release.
- Until patches arrive, officials recommend disabling nested virtualization as a mitigation measure.
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