CVE-2014-3690 (debian_linux, enterprise_linux, evergreen, linux_enterprise_real_time_extension, linux_enterprise_software_development_kit, linux_enterprise_workstation_extension, linux_kernel, suse_linux_enterprise_desktop, suse_linux_enterprise_server, ubuntu_linux)

arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before 3.17.2 on Intel processors does not ensure that the value in the CR4 control register remains the same after a VM entry, which allows host OS users to kill arbitrary processes or cause a denial of service (system disruption) by leveraging /dev/kvm access, as demonstrated by PR_SET_TSC prctl calls within a modified copy of QEMU.