Divide By Zero Affecting qemu-kvm-common-rhev package, versions <10:2.9.0-10.el7


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.06% (29th percentile)

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  • Snyk IDSNYK-RHEL7-QEMUKVMCOMMONRHEV-5077808
  • published26 Jul 2021
  • disclosed18 Oct 2016

Introduced: 18 Oct 2016

CVE-2016-9921  (opens in a new tab)
CWE-369  (opens in a new tab)

How to fix?

Upgrade RHEL:7 qemu-kvm-common-rhev to version 10:2.9.0-10.el7 or higher.
This issue was patched in RHSA-2017:2408.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu-kvm-common-rhev package and not the qemu-kvm-common-rhev package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

Quick emulator (Qemu) built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to a divide by zero issue. It could occur while copying VGA data when cirrus graphics mode was set to be VGA. A privileged user inside guest could use this flaw to crash the Qemu process instance on the host, resulting in DoS.

CVSS Scores

version 3.1