CentOS Errata and Security Advisory 2006:0498
https://rhn.redhat.com/errata/RHSA-2006-0498.html
The following updated files have been uploaded and are currently syncing to the mirrors:
s390: updates/s390/RPMS/xscreensaver-4.10-20.s390.rpm
s390x: updates/s390x/RPMS/xscreensaver-4.10-20.s390x.rpm