Medium severity6.5NVD Advisory· Published Dec 23, 2016· Updated Jun 17, 2026

CVE-2016-9921

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

QEMU/Qemu4 versions
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*+ 3 more
- cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*range: <=2.7.1
- cpe:2.3:a:qemu:qemu:2.8.0:rc0:*:*:*:*:*:*
- cpe:2.3:a:qemu:qemu:2.8.0:rc1:*:*:*:*:*:*
- cpe:2.3:a:qemu:qemu:2.8.0:rc2:*:*:*:*:*:*
Red Hat/Openstack6 versions
cpe:2.3:a:redhat:openstack:10:*:*:*:*:*:*:*+ 5 more
- cpe:2.3:a:redhat:openstack:10:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openstack:11:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openstack:6.0:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openstack:7.0:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openstack:8:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openstack:9:*:*:*:*:*:*:*
Red Hat/Virtualization
cpe:2.3:a:redhat:virtualization:4.0:*:*:*:*:*:*:*
Debian/linux
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
Quick Emulator/Qemullm-fuzzy
osv-coords34 versions
pkg:rpm/opensuse/qemu&distro=openSUSE%20Tumbleweed pkg:rpm/opensuse/xen&distro=openSUSE%20Tumbleweed pkg:rpm/suse/kvm&distro=SUSE%20Linux%20Enterprise%20Point%20of%20Sale%2011%20SP3 pkg:rpm/suse/kvm&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-LTSS pkg:rpm/suse/kvm&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-TERADATA pkg:rpm/suse/kvm&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4 pkg:rpm/suse/kvm&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4 pkg:rpm/suse/qemu&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP1 pkg:rpm/suse/qemu&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP2 pkg:rpm/suse/qemu&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1 pkg:rpm/suse/qemu&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2 pkg:rpm/suse/qemu&distro=SUSE%20Linux%20Enterprise%20Server%2012-LTSS pkg:rpm/suse/qemu&distro=SUSE%20Linux%20Enterprise%20Server%20for%20Raspberry%20Pi%2012%20SP2 pkg:rpm/suse/qemu&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012 pkg:rpm/suse/qemu&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1 pkg:rpm/suse/qemu&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2 pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP1 pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP2 pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Point%20of%20Sale%2011%20SP3 pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-LTSS pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4 pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1 pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2 pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%2012-LTSS pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4 pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012 pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1 pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2 pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2011%20SP4 pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP1 pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP2 pkg:rpm/suse/xen&distro=SUSE%20Manager%202.1 pkg:rpm/suse/xen&distro=SUSE%20Manager%20Proxy%202.1 pkg:rpm/suse/xen&distro=SUSE%20OpenStack%20Cloud%205
< 6.1.0-32.1+ 33 more
- (no CPE)range: < 6.1.0-32.1
- (no CPE)range: < 4.15.1_01-1.2
- (no CPE)range: < 1.4.2-53.11.1
- (no CPE)range: < 1.4.2-53.11.1
- (no CPE)range: < 1.4.2-53.11.1
- (no CPE)range: < 1.4.2-59.1
- (no CPE)range: < 1.4.2-59.1
- (no CPE)range: < 2.3.1-32.11
- (no CPE)range: < 2.6.2-39.1
- (no CPE)range: < 2.3.1-32.11
- (no CPE)range: < 2.6.2-39.1
- (no CPE)range: < 2.0.2-48.31.1
- (no CPE)range: < 2.6.2-39.1
- (no CPE)range: < 2.0.2-48.31.1
- (no CPE)range: < 2.3.1-32.11
- (no CPE)range: < 2.6.2-39.1
- (no CPE)range: < 4.5.5_06-22.11.2
- (no CPE)range: < 4.7.1_06-31.1
- (no CPE)range: < 4.2.5_21-35.1
- (no CPE)range: < 4.2.5_21-35.1
- (no CPE)range: < 4.4.4_14-51.1
- (no CPE)range: < 4.5.5_06-22.11.2
- (no CPE)range: < 4.7.1_06-31.1
- (no CPE)range: < 4.4.4_14-22.33.1
- (no CPE)range: < 4.4.4_14-51.1
- (no CPE)range: < 4.4.4_14-22.33.1
- (no CPE)range: < 4.5.5_06-22.11.2
- (no CPE)range: < 4.7.1_06-31.1
- (no CPE)range: < 4.4.4_14-51.1
- (no CPE)range: < 4.5.5_06-22.11.2
- (no CPE)range: < 4.7.1_06-31.1
- (no CPE)range: < 4.2.5_21-35.1
- (no CPE)range: < 4.2.5_21-35.1
- (no CPE)range: < 4.2.5_21-35.1

Patches

Vulnerability mechanics

References

www.openwall.com/lists/oss-security/2016/12/09/1nvdMailing ListPatchThird Party Advisory
www.securityfocus.com/bid/94803nvdThird Party AdvisoryVDB Entry
access.redhat.com/errata/RHSA-2017:2392nvdThird Party Advisory
access.redhat.com/errata/RHSA-2017:2408nvdThird Party Advisory
lists.debian.org/debian-lts-announce/2018/09/msg00007.htmlnvdMailing ListThird Party Advisory
security.gentoo.org/glsa/201701-49nvdThird Party Advisory

News mentions

No linked articles in our index yet.

cvss	0.423
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000