The following errata for CentOS-2 have been built and uploaded to the
centos mirror:

RHSA-2007:0912-01 Important: libvorbis security update

Files available:
libvorbis-1.0rc2-7.el2.i386.rpm
libvorbis-devel-1.0rc2-7.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