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TI-2016-08040 Aliases CVE-2016-9921GHSA-5wpx-5h74-2wwx

Quick emulator (Qemu) built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable…

Priority LOW 29CWE-369Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 7 fixed, 4 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-369.

Summary

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.

Why it matters now

EPSS 0.0041 35th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 7 fixed, 4 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 13

CPEVersionsRoleVendor
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*up to 2.7.1VulnerableQEMU
cpe:2.3:a:qemu:qemu:2.8.0:rc0:*:*:*:*:*:*2.8.0 rc0VulnerableQEMU
cpe:2.3:a:qemu:qemu:2.8.0:rc1:*:*:*:*:*:*2.8.0 rc1VulnerableQEMU
cpe:2.3:a:qemu:qemu:2.8.0:rc2:*:*:*:*:*:*2.8.0 rc2VulnerableQEMU
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
cpe:2.3:a:redhat:openstack:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:a:redhat:openstack:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:a:redhat:openstack:8:*:*:*:*:*:*:*8VulnerableRed Hat
cpe:2.3:a:redhat:openstack:9:*:*:*:*:*:*:*9VulnerableRed Hat
cpe:2.3:a:redhat:openstack:10:*:*:*:*:*:*:*10VulnerableRed Hat
  • cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* Versions up to 2.7.1 Vulnerable ·QEMU
  • cpe:2.3:a:qemu:qemu:2.8.0:rc0:*:*:*:*:*:* Versions 2.8.0 rc0 Vulnerable ·QEMU
  • cpe:2.3:a:qemu:qemu:2.8.0:rc1:*:*:*:*:*:* Versions 2.8.0 rc1 Vulnerable ·QEMU
  • cpe:2.3:a:qemu:qemu:2.8.0:rc2:*:*:*:*:*:* Versions 2.8.0 rc2 Vulnerable ·QEMU
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
  • cpe:2.3:a:redhat:openstack:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:a:redhat:openstack:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:a:redhat:openstack:8:*:*:*:*:*:*:* Versions 8 Vulnerable ·Red Hat
  • cpe:2.3:a:redhat:openstack:9:*:*:*:*:*:*:* Versions 9 Vulnerable ·Red Hat
  • cpe:2.3:a:redhat:openstack:10:*:*:*:*:*:*:* Versions 10 Vulnerable ·Red Hat
Show 3 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:redhat:openstack:11:*:*:*:*:*:*:*11VulnerableRed Hat
cpe:2.3:a:redhat:virtualization:4.0:*:*:*:*:*:*:*4.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*7.0Running onRed Hat
  • cpe:2.3:a:redhat:openstack:11:*:*:*:*:*:*:* Versions 11 Vulnerable ·Red Hat
  • cpe:2.3:a:redhat:virtualization:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Running on ·Red Hat

Remediation

Red Hat 2 advisories

  • RHSA-2017:2408 Released 2017-08-01 · Red Hat rating Moderate
    qemu-kvm-rhev security and bug fix update
    • Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7 qemu-img-rhev-10:2.9.0-10.el7, qemu-kvm-common-rhev-10:2.9.0-10.el7, qemu-kvm-rhev-10:2.9.0-10.el7 +1
    • Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7 qemu-img-rhev-10:2.9.0-10.el7, qemu-kvm-common-rhev-10:2.9.0-10.el7, qemu-kvm-rhev-10:2.9.0-10.el7 +1
    • Red Hat OpenStack Platform 10.0 qemu-img-rhev-10:2.9.0-10.el7, qemu-kvm-common-rhev-10:2.9.0-10.el7, qemu-kvm-rhev-10:2.9.0-10.el7 +1
    • Red Hat OpenStack Platform 11.0 qemu-img-rhev-10:2.9.0-10.el7, qemu-kvm-common-rhev-10:2.9.0-10.el7, qemu-kvm-rhev-10:2.9.0-10.el7 +1
    • Red Hat OpenStack Platform 8.0 (Liberty) qemu-img-rhev-10:2.9.0-10.el7, qemu-kvm-common-rhev-10:2.9.0-10.el7, qemu-kvm-rhev-10:2.9.0-10.el7 +1
    • Red Hat OpenStack Platform 9.0 qemu-img-rhev-10:2.9.0-10.el7, qemu-kvm-common-rhev-10:2.9.0-10.el7, qemu-kvm-rhev-10:2.9.0-10.el7 +1
  • RHSA-2017:2392 Released 2017-08-01 · Red Hat rating Important
    qemu-kvm-rhev security, bug fix, and enhancement update
    • Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts qemu-img-rhev-10:2.9.0-14.el7, qemu-kvm-common-rhev-10:2.9.0-14.el7, qemu-kvm-rhev-10:2.9.0-14.el7 +1

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux 7AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse)AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7Fixed RHSA-2017:2408
Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7Fixed RHSA-2017:2408
Red Hat OpenStack Platform 10.0Fixed RHSA-2017:2408
Red Hat OpenStack Platform 11.0Fixed RHSA-2017:2408
Red Hat OpenStack Platform 8.0 (Liberty)Fixed RHSA-2017:2408
Red Hat OpenStack Platform 9.0Fixed RHSA-2017:2408
Red Hat Virtualization 4 Management Agent for RHEL 7 HostsFixed RHSA-2017:2392

Timeline

  1. 2026-10-02 Threatist record created from CVE-2016-9921
  2. 2026-10-03 Alias added: GHSA-5wpx-5h74-2wwx

References

Patch 1

Advisory 4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences