CVE-2016-9921

MEDIUM

Qemu < 2.7.1 - Divide By Zero

Title source: rule

Description

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.

References (6)

[Mailing List, Patch, Third Party Advisory] http://www.openwall.com/lists/oss-security/2016/12/09/1

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/94803

[Third Party Advisory] https://access.redhat.com/errata/RHSA-2017:2392

[Third Party Advisory] https://access.redhat.com/errata/RHSA-2017:2408

[Mailing List, Third Party Advisory] https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html

[Third Party Advisory] https://security.gentoo.org/glsa/201701-49

Scores

CVSS v3 6.5

EPSS 0.0010

EPSS Percentile 28.3%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Classification

CWE

CWE-369

Status draft

Affected Products (12)

qemu/qemu < 2.7.1

qemu/qemu

qemu/qemu

qemu/qemu

debian/debian_linux

redhat/openstack

redhat/openstack

redhat/openstack

redhat/openstack

redhat/openstack

redhat/openstack

redhat/virtualization

Timeline

Published Dec 23, 2016

Tracked Since Feb 18, 2026