KVM (Kernel-based Virtual Machine) is a full virtualization solution forLinux on AMD64 and Intel 64 systems. The qemu-kvm package provides theuser-space component for running virtual machines using KVM.Two integer overflow flaws were found in the QEMU block driver for QCOWversion 1 disk images. A user able to alter the QEMU disk image filesloaded by a guest could use either of these flaws to corrupt QEMU processmemory on the host, which could potentially result in arbitrary codeexecution on the host with the privileges of the QEMU process.(CVE-2014-0222, CVE-2014-0223)Red Hat would like to thank NSA for reporting these issues.This update also fixes the following bugs:All qemu-kvm users are advised to upgrade to these updated packages, whichcontain backported patches to correct these issues. After installing thisupdate, shut down all running virtual machines. Once all virtual machineshave shut down, start them again for this update to take effect.