A GDK-PixBuf security update has been released for Ubuntu Linux 20.04 LTS and 20.10.

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Ubuntu Security Notice USN-4743-1
February 22, 2021

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

- Ubuntu 20.10
- Ubuntu 20.04 LTS

Summary:

GDK-PixBuf could be made to crash if it opened a specially crafted file.

Software Description:
- gdk-pixbuf: GDK Pixbuf library

Details:

It was discovered that the GDK-PixBuf library did not properly handle
certain GIF images. If an user or automated system were tricked into
opening a specially crafted GIF file, a remote attacker could use this flaw
to cause GDK-PixBuf to crash, resulting in a denial of service.

Update instructions:

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

Ubuntu 20.10:
libgdk-pixbuf2.0-0 2.40.0+dfsg-5ubuntu0.2

Ubuntu 20.04 LTS:
libgdk-pixbuf2.0-0 2.40.0+dfsg-3ubuntu0.2

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

References:
  https://usn.ubuntu.com/4743-1
CVE-2021-20240

Package Information:
  https://launchpad.net/ubuntu/+source/gdk-pixbuf/2.40.0+dfsg-5ubuntu0.2
  https://launchpad.net/ubuntu/+source/gdk-pixbuf/2.40.0+dfsg-3ubuntu0.2