CVE-2016-9922 Denial of service in n/a
A local guest OS user can crash the QEMU process via a divide-by-zero error in the Cirrus VGA driver, causing denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-9922?
CVE-2016-9922 is a medium-severity denial of service vulnerability in Qemu Qemu, published on 27 Mar 2017. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The cirrus_do_copy function in hw/display/cirrus_vga.c in QEMU (aka Quick Emulator), when cirrus graphics mode is VGA, allows local guest OS privileged users to cause a denial of service (divide-by-zero error and QEMU process crash) via vectors involving blit pitch values.
Weakness: CWE-369
Which versions are affected by CVE-2016-9922?
It affects 1 product.
Products include Qemu Qemu.
How do I fix CVE-2016-9922?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2016-9922 being exploited?
There is no known exploitation of CVE-2016-9922 in the wild and no public exploit code.
Other vulnerabilities in Qemu Qemu
Sources
Also known as DEBIAN-CVE-2016-9922, GHSA-83fr-598x-jggw, UBUNTU-CVE-2016-9922.