Red Hat Security Advisory 2015-2696-01 – KVM is a full virtualization solution for Linux on AMD64 and Intel 64 systems. The qemu-kvm-rhev package provides the user-space component for running virtual machines using KVM. A heap-based buffer overflow flaw was discovered in the way QEMU’s AMD PC-Net II Ethernet Controller emulation received certain packets in loopback mode. A privileged user inside a guest could use this flaw to crash the host QEMU process or, potentially, execute arbitrary code with privileges of the host QEMU process.