Vulnerability in Qemu
CVE-2016-9921
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.
EPSS: 0.004 (32.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.
Affected products
- Qemu — versions 2.8.0
- Debian Debian_linux — versions 8.0
- Redhat Enterprise_linux — versions 7.0
- Redhat Openstack — versions 6.0, 7.0, 8
- Redhat Virtualization — versions 4.0
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
- secalert@redhat.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (mailing-list, x_refsource_MLIST, Patch, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2016-9921?
- CVE-2016-9921 is a medium-severity vulnerability in Qemu, classified under Divide By Zero. CVSS score: 6.5/10. Published 2016-12-23.
- How severe is CVE-2016-9921?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2016-9921 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.