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…
EPSS: 0.001 (22.7th 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
- [debian-lts-announce] 20180906 [SECURITY] [DLA 1497-1] qemu security update (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- RHSA-2017:2392 (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- GLSA-201701-49 (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
- 94803 (Third Party Advisory, VDB Entry, vdb-entry, x_refsource_BID)
- RHSA-2017:2408 (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- [oss-security] 20161209 Re: CVE request Qemu: display: cirrus_vga: a divide by zero in cirrus_do_copy (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.