Google has launched a vulnerability reward program (VRP) for the open source Kernel-based Virtual Machine (KVM) hypervisor, offering up to $250,000 for successful exploits. The contest, known as “kvmCTF”, allows participants to log in as a guest and attempt to find zero-day vulnerabilities in the KVM host kernel. The top prize is $250,000 for a full VM escape, while other rewards range from $10,000 to $50,000.