qemu - security update

Multiple vulnerabilities have been found in QEMU:

• CVE-2016-9911
  Quick Emulator (Qemu) built with the USB EHCI Emulation support
  is vulnerable to a memory leakage issue. It could occur while
  processing packet data in ehci_init_transfer. A guest user/
  process could use this issue to leak host memory, resulting in
  DoS for a host.
• CVE-2016-9921 /
  CVE-2016-9922
  Quick emulator (Qemu) built with the Cirrus CLGD 54xx VGA Emulator
  support is vulnerable to a divide by zero issue. It could occur
  while copying VGA data when cirrus graphics mode was set to be
  VGA. A privileged user inside guest could use this flaw to crash
  the Qemu process instance on the host, resulting in DoS.

For Debian 7 Wheezy, these problems have been fixed in version
1.1.2+dfsg-6+deb7u19.

We recommend that you upgrade your qemu packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: <https://wiki.debian.org/LTS&gt;