Mac mini ServerImportance: High
Patch KVM or Proxmox hosts using nested virtualization
r/homelabJul 7, 2026 · 5d ago
A newly disclosed flaw, CVE-2026-53359, is also called Januscape. It affects KVM's shadow paging code when is turned on.
means running a inside another . A public PoC can make the host server crash in a reliable way.
Patched kernels are now available. If updating is not possible right away, the advised is to turn off for that are not fully trusted.
Key points
- CVE-2026-53359 is also known as Januscape.
- The issue affects KVM when is enabled.
- A public PoC can crash the host server.
- Patched kernels are already available.
- The short-term is to disable for untrusted .