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Vulnerability of QEMU: infinite loop via PVSCSI IO Request Descriptor

Synthesis of the vulnerability 

An attacker, in a guest system, can generate an infinite loop via PVSCSI IO Request Descriptor of QEMU, in order to trigger a denial of service on the host system.
Vulnerable products: Debian, Fedora, openSUSE Leap, QEMU, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this weakness: 1/4.
Creation date: 06/09/2016.
Références of this bulletin: CVE-2016-7156, DLA-1599-1, FEDORA-2016-a56fb613a8, openSUSE-SU-2016:2642-1, SUSE-SU-2016:2589-1, USN-3125-1, VIGILANCE-VUL-20526.

Description of the vulnerability 

An attacker, in a guest system, can generate an infinite loop via PVSCSI IO Request Descriptor of QEMU, in order to trigger a denial of service on the host system.
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This cybersecurity threat impacts software or systems such as Debian, Fedora, openSUSE Leap, QEMU, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this computer threat note is low.

The trust level is of type confirmed by the editor, with an origin of user shell.

An attacker with a expert ability can exploit this security threat.

Solutions for this threat 

QEMU: patch for PVSCSI IO Request Descriptor.
A patch is indicated in information sources.

Debian 8: new qemu packages.
New packages are available:
  Debian 8: qemu 1:2.1+dfsg-12+deb8u8

Fedora 24: new qemu packages (19/10/2016).
New packages are available:
  Fedora 24: qemu 2.6.2-2.fc24

openSUSE Leap 42.1: new qemu packages.
New packages are available:
  openSUSE Leap 42.1: qemu 2.3.1-19.3

SUSE LE 12 SP1: new qemu packages (24/10/2016).
New packages are available:
  SUSE LE 12 SP1: qemu 2.3.1-21.1

Ubuntu: new qemu packages (10/11/2016).
New packages are available:
  Ubuntu 12.04 LTS: qemu 1.0+noroms-0ubuntu14.31
  Ubuntu 14.04 LTS: qemu 2.0.0+dfsg-2ubuntu1.30
  Ubuntu 16.04 LTS: qemu 1:2.5+dfsg-5ubuntu10.6
  Ubuntu 16.10: qemu 1:2.6.1+dfsg-0ubuntu5.1
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