Security Advisory Important: rhev-hypervisor security update

Advisory: RHSA-2015:1011-1
Type: Security Advisory
Severity: Important
Issued on: 2015-05-15
Last updated on: 2015-05-15
Affected Products: Red Hat Enterprise Virtualization 3
CVEs ( CVE-2015-3456


Updated rhev-hypervisor packages that fix one security issue are now

Red Hat Product Security has rated this update as having Important 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.

The rhev-hypervisor packages provide a Red Hat Enterprise Virtualization
Hypervisor ISO disk image. The Red Hat Enterprise Virtualization Hypervisor
is a dedicated Kernel-based Virtual Machine (KVM) hypervisor. It includes
everything necessary to run and manage virtual machines: a subset of the
Red Hat Enterprise Linux operating environment and the Red Hat Enterprise
Virtualization Agent.

Note: Red Hat Enterprise Virtualization Hypervisor is only available for
the Intel 64 and AMD64 architectures with virtualization extensions.

An out-of-bounds memory access flaw was found in the way QEMU's virtual
Floppy Disk Controller (FDC) handled FIFO buffer access while processing
certain FDC commands. A privileged guest user could use this flaw to crash
the guest or, potentially, execute arbitrary code on the host with the
privileges of the host's QEMU process corresponding to the guest.

Red Hat would like to thank Jason Geffner of CrowdStrike for reporting
this issue.

Users of the Red Hat Enterprise Virtualization Hypervisor are advised to
upgrade to this updated package.


Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

Updated packages

Red Hat Enterprise Virtualization 3

File outdated by:  RHEA-2016:1555
    MD5: 4d6d93efffa521e64b377822d367be2b
SHA-256: 3ee5bc830a0c5f2ea2f368012b372f16bbe0d6d9188bebef6ff3612ca7f6523d
(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

1218611 - CVE-2015-3456 qemu: fdc: out-of-bounds fifo buffer memory access


These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from:

The Red Hat security contact is More contact details at