USN-1590-1: QEMU vulnerability

2 October 2012

qemu-kvm vulnerability

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

  • Ubuntu 12.04 LTS
  • Ubuntu 11.10
  • Ubuntu 11.04
  • Ubuntu 10.04 LTS


QEMU could be made to crash or run programs.

Software Description

  • qemu-kvm - Machine emulator and virtualizer


It was discovered that QEMU incorrectly handled certain VT100 escape sequences. A guest user with access to an emulated character device could use this flaw to cause QEMU to crash, or possibly execute arbitrary code on the host.

Update instructions

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

Ubuntu 12.04 LTS
qemu-kvm - 1.0+noroms-0ubuntu14.2
Ubuntu 11.10
qemu-kvm - 0.14.1+noroms-0ubuntu6.5
Ubuntu 11.04
qemu-kvm - 0.14.0+noroms-0ubuntu4.7
Ubuntu 10.04 LTS
qemu-kvm - 0.12.3+noroms-0ubuntu9.20

To update your system, please follow these instructions:

After a standard system update you need to restart your virtual machines to make all the necessary changes.