arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel through 3.17.2 does not have an exit handler for the INVVPID instruction, which allows guest OS users to cause a denial of service (guest OS crash) via a crafted application. http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-3646
