Red Hat Security Advisory 2015-1931-01 – 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. It was found that the QEMU’s websocket frame decoder processed incoming frames without limiting resources used to process the header and the payload. An attacker able to access a guest’s VNC console could use this flaw to trigger a denial of service on the host by exhausting all available memory and CPU. This issue was discovered by Daniel P. Berrange of Red Hat.