CVE-2016-6833 Use after free in n/a
Local guest administrators can crash the QEMU instance via a use-after-free in the vmxnet3 device emulation, causing denial of service.
- 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-2016-6833?
CVE-2016-6833 is a medium-severity use after free vulnerability in Debian Debian Linux, 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
Use-after-free vulnerability in the vmxnet3_io_bar0_write function in hw/net/vmxnet3.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (QEMU instance crash) by leveraging failure to check if the device is active.
Weakness: CWE-416
Which versions are affected by CVE-2016-6833?
It affects 2 products.
Products include Debian Debian Linux, Qemu Qemu.
How do I fix CVE-2016-6833?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2016-6833 being exploited?
There is no known exploitation of CVE-2016-6833 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2016-6833, GHSA-78cx-qvrx-grfp, UBUNTU-CVE-2016-6833.