CVE-2022-49559

CVE-2022-49559 (Linux kernel, KVM/x86) is resolved. The issue involved dropping WARNs that incorrectly assumed KVM cannot let a triple fault (KVM_REQ_TRIPLE_FAULT) escape from L2 to L1. The vulnerability could be triggered when userspace injects a machine check while L2 is active with CR4.MCE=0, ...