The following errata for CentOS-2 have been built and uploaded to the centos mirror:
RHSA-2005:343-01 Important: gdk-pixbuf security update
Files available: gdk-pixbuf-0.22.0-12.el2.i386.rpm gdk-pixbuf-devel-0.22.0-12.el2.i386.rpm gdk-pixbuf-gnome-0.22.0-12.el2.i386.rpm
More details are available from the RedHat web site at https://rhn.redhat.com/errata/rh21as-errata.html
The easy way to make sure you are up to date with all the latest patches is to run: # yum update