CentOS Errata and Security Advisory CESA-2010:0898
KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. KVM is a Linux kernel module built for the standard Red Hat Enterprise Linux kernel.
A flaw was found in the way QEMU-KVM handled the reloading of fs and gs segment registers when they had invalid selectors. A privileged host user with access to "/dev/kvm" could use this flaw to crash the host (denial of service). (CVE-2010-3698)
All KVM users should upgrade to these updated packages, which contain a backported patch to correct this issue. Note: The procedure in the Solution section must be performed before this update will take effect.
Merged security bulletin from advisories: http://lists.centos.org/pipermail/centos-announce/2010-December/029251.html http://lists.centos.org/pipermail/centos-announce/2010-December/029252.html
Affected packages: kmod-kvm kvm kvm-qemu-img kvm-tools
Upstream details at: https://rhn.redhat.com/errata/RHSA-2010-0898.html