Moderate CentOS qemu-kvm Security Update


libcacard-1.5.3-86.el7_1.8.i686.rpm, libcacard-1.5.3-86.el7_1.8.x86_64.rpm, libcacard-devel-1.5.3-86.el7_1.8.i686.rpm, libcacard-devel-1.5.3-86.el7_1.8.x86_64.rpm, libcacard-tools-1.5.3-86.el7_1.8.x86_64.rpm, qemu-img-1.5.3-86.el7_1.8.x86_64.rpm, qemu-kvm-1.5.3-86.el7_1.8.src.rpm, qemu-kvm-1.5.3-86.el7_1.8.x86_64.rpm, qemu-kvm-common-1.5.3-86.el7_1.8.x86_64.rpm, qemu-kvm-tools-1.5.3-86.el7_1.8.x86_64.rpm,
2018-01-18 11:10
2017-07-27 19:10
2017-04-01 19:09
2017-01-05 20:13


Updated qemu-kvm packages that fix one security issue are now available for
Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having Moderate security
impact. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available from the CVE link in the
References section.

KVM (Kernel-based Virtual Machine) is a full virtualization solution for
Linux on AMD64 and Intel 64 systems. The qemu-kvm 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. (CVE-2015-1779)

This issue was discovered by Daniel P. Berrange of Red Hat.

All qemu-kvm users are advised to upgrade to these updated packages, which
contain a backported patch to correct this issue. After installing this
update, shut down all running virtual machines. Once all virtual machines
have shut down, start them again for this update to take effect.
Please see

Am I vulnerable?

The constraints below list the versions that this vulnerability is patched in, and versions that are unaffected. If a patch is ready but unrealeased, then it is pending.

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Affected package information

Release Package Patched in
7 libcacard libcacard-1.5.3-86.el7_1.8.i686.rpm
libcacard libcacard-1.5.3-86.el7_1.8.x86_64.rpm
libcacard-devel libcacard-devel-1.5.3-86.el7_1.8.i686.rpm
libcacard-devel libcacard-devel-1.5.3-86.el7_1.8.x86_64.rpm
libcacard-tools libcacard-tools-1.5.3-86.el7_1.8.x86_64.rpm
qemu-img qemu-img-1.5.3-86.el7_1.8.x86_64.rpm
qemu-kvm qemu-kvm-1.5.3-86.el7_1.8.src.rpm
qemu-kvm qemu-kvm-1.5.3-86.el7_1.8.x86_64.rpm
qemu-kvm-common qemu-kvm-common-1.5.3-86.el7_1.8.x86_64.rpm
qemu-kvm-tools qemu-kvm-tools-1.5.3-86.el7_1.8.x86_64.rpm