Important CentOS kvm Security Update


kmod-kvm-83-270.el5.centos.x86_64.rpm, kmod-kvm-debug-83-270.el5.centos.x86_64.rpm, kvm-83-270.el5.centos.src.rpm, kvm-83-270.el5.centos.x86_64.rpm, kvm-qemu-img-83-270.el5.centos.x86_64.rpm, kvm-tools-83-270.el5.centos.x86_64.rpm
CVE-2014-3610, CVE-2014-3611,
2017-07-27 19:09
CVE-2014-3611 linux
CVE-2014-3610 linux
2017-04-01 19:08
2017-01-05 20:13


Updated kvm packages that fix two security issues are now available for Red
Hat Enterprise Linux 5.

Red Hat Product Security has rated this update as having Important security
impact. Common Vulnerability Scoring System (CVSS) base scores, which give
detailed severity ratings, are available for each vulnerability from the
CVE links in the References section.

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.

It was found that KVM's Write to Model Specific Register (WRMSR)
instruction emulation would write non-canonical values passed in by the
guest to certain MSRs in the host's context. A privileged guest user could
use this flaw to crash the host. (CVE-2014-3610)

A race condition flaw was found in the way the Linux kernel's KVM subsystem
handled PIT (Programmable Interval Timer) emulation. A guest user who has
access to the PIT I/O ports could use this flaw to crash the host.

Red Hat would like to thank Lars Bull of Google and Nadav Amit for
reporting the CVE-2014-3610 issue, and Lars Bull of Google for reporting
the CVE-2014-3611 issue.

All kvm users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues. Note: The procedure in
the Solution section must be performed before this update will take effect.
Please see

Am I vulnerable?

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Affected package information

Release Package Patched in
5 kmod-kvm kmod-kvm-83-270.el5.centos.x86_64.rpm
kmod-kvm-debug kmod-kvm-debug-83-270.el5.centos.x86_64.rpm
kvm kvm-83-270.el5.centos.src.rpm
kvm kvm-83-270.el5.centos.x86_64.rpm
kvm-qemu-img kvm-qemu-img-83-270.el5.centos.x86_64.rpm
kvm-tools kvm-tools-83-270.el5.centos.x86_64.rpm