CVE-2016-6490 Denial of service in n/a
Local guest administrators can crash the QEMU process via an infinite loop triggered by a zero-length descriptor buffer in virtio.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-6490?
CVE-2016-6490 is a medium-severity denial of service vulnerability in Qemu Qemu, published on 10 Dec 2016. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The virtqueue_map_desc function in hw/virtio/virtio.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via a zero length for the descriptor buffer.
Weakness: CWE-120
Which versions are affected by CVE-2016-6490?
It affects 1 product.
Products include Qemu Qemu.
How do I fix CVE-2016-6490?
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-2016-6490 being exploited?
There is no known exploitation of CVE-2016-6490 in the wild and no public exploit code.
Other vulnerabilities in Qemu Qemu
Sources
Also known as DEBIAN-CVE-2016-6490, GHSA-683h-m32r-vcgg.