Red Hat Security Advisory 2015-1740-01 – 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 in environments managed by Red Hat Enterprise Virtualization Manager. An information leak flaw was found in the way QEMU’s RTL8139 emulation implementation processed network packets under RTL8139 controller’s C+ mode of operation. An unprivileged guest user could use this flaw to read up to 65 KB of uninitialized QEMU heap memory.