CVE-2022-3344

A flaw was found in the KVM’s AMD nested virtualization (SVM). A malicious L1 guest could purposely fail to intercept the shutdown of a cooperative nested guest (L2), possibly leading to a page fault and kernel panic in the host (L0).

Mitigation

This vulnerability can be mitigated by disabling the nested virtualization feature:

# modprobe -r kvm_amd  
# modprobe kvm_amd nested=0