A GDK-PixBuf update has been released for Ubuntu Linux

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Ubuntu Security Notice USN-3532-1
January 15, 2018

gdk-pixbuf vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 17.10
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in GDK-PixBuf.

Software Description:
- gdk-pixbuf: GDK Pixbuf library

Details:

It was discoreved that GDK-PixBuf incorrectly handled certain gif
images. An attacker could use this to execute arbitrary code. This
issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. 
(CVE-2017-1000422)

Ariel Zelivansky discovered that GDK-PixBuf incorrectly handled certain
images. An attacker could use this to cause a denial of service.
(CVE-2017-6312, CVE-2017-6313)

Ariel Zelivansky discovered that GDK-PixBuf incorrectly handled large
TIFF files. An attacker could use this to cause a denial of service.
(CVE-2017-6314)

Update instructions:

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

Ubuntu 17.10:
  libgdk-pixbuf2.0-0 2.36.11-1ubuntu0.1

Ubuntu 16.04 LTS:
  libgdk-pixbuf2.0-0 2.32.2-1ubuntu1.4

Ubuntu 14.04 LTS:
  libgdk-pixbuf2.0-0 2.30.7-0ubuntu1.8

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

References:
  https://www.ubuntu.com/usn/usn-3532-1
  CVE-2017-1000422, CVE-2017-6312, CVE-2017-6313, CVE-2017-6314

Package Information:
  https://launchpad.net/ubuntu/+source/gdk-pixbuf/2.36.11-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/gdk-pixbuf/2.32.2-1ubuntu1.4
  https://launchpad.net/ubuntu/+source/gdk-pixbuf/2.30.7-0ubuntu1.8

  GDK-PixBuf Vulnerabilities for Ubuntu