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.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.07%
Vendor Advisory redhat.com Vendor Advisory gentoo.org Vendor Advisory redhat.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html third party advisory mailing list
https://access.redhat.com/errata/RHSA-2017:2392 third party advisory vendor advisory
https://security.gentoo.org/glsa/201701-49 third party advisory vendor advisory
http://www.securityfocus.com/bid/94803 third party advisory vdb entry
https://access.redhat.com/errata/RHSA-2017:2408 third party advisory vendor advisory
http://www.openwall.com/lists/oss-security/2016/12/09/1 patch mailing list third party advisory

Frequently Asked Questions

What is the severity of CVE-2016-9921?
CVE-2016-9921 has been scored as a medium severity vulnerability.
How to fix CVE-2016-9921?
To fix CVE-2016-9921, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-9921 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2016-9921 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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