USN-1714-1: QXL graphics driver vulnerability

5 February 2013

xserver-xorg-video-qxl vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 12.04 LTS
  • Ubuntu 11.10


Guests using the QXL graphics driver could be caused to hang or crash.

Software Description

  • xserver-xorg-video-qxl - X.Org X server – QXL display driver


It was discovered that the QXL graphics driver incorrectly handled terminated connections. An attacker that could connect to a guest using SPICE and the QXL graphics driver could cause the guest to hang or crash, resulting in a denial of service.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 12.04 LTS
xserver-xorg-video-qxl - 0.0.16-2ubuntu0.1
Ubuntu 11.10
xserver-xorg-video-qxl - 0.0.14-1ubuntu0.1

To update your system, please follow these instructions:

After a standard system update you need to reboot your computer to make all the necessary changes.