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

RHSA-2005:782-01 Moderate: util-linux and mount security update

Files available:
losetup-2.11g-9.i386.rpm
mount-2.11g-9.i386.rpm
util-linux-2.11f-20.8.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