https://rhn.redhat.com/errata/RHSA-2004-689.html
Updated files are :-
updates/i386/RPMS/kernel-2.4.21-27.0.1.EL.athlon.rpm updates/i386/RPMS/kernel-2.4.21-27.0.1.EL.i686.rpm updates/i386/RPMS/kernel-BOOT-2.4.21-27.0.1.EL.i386.rpm updates/i386/RPMS/kernel-doc-2.4.21-27.0.1.EL.i386.rpm updates/i386/RPMS/kernel-hugemem-2.4.21-27.0.1.EL.i686.rpm updates/i386/RPMS/kernel-hugemem-unsupported-2.4.21-27.0.1.EL.i686.rpm updates/i386/RPMS/kernel-smp-2.4.21-27.0.1.EL.athlon.rpm updates/i386/RPMS/kernel-smp-2.4.21-27.0.1.EL.i686.rpm updates/i386/RPMS/kernel-smp-unsupported-2.4.21-27.0.1.EL.athlon.rpm updates/i386/RPMS/kernel-smp-unsupported-2.4.21-27.0.1.EL.i686.rpm updates/i386/RPMS/kernel-source-2.4.21-27.0.1.EL.i386.rpm updates/i386/RPMS/kernel-unsupported-2.4.21-27.0.1.EL.athlon.rpm updates/i386/RPMS/kernel-unsupported-2.4.21-27.0.1.EL.i686.rpm
extras/i386/RPMS/kernel-2.4.21-27.0.1.EL.i586.rpm extras/i386/RPMS/kernel-unsupported-2.4.21-27.0.1.EL.i586.rpm
updates/i386/SRPMS/kernel-2.4.21-27.0.1.EL.src.rpm
To update run 'yum update kernel' and then you will need to reboot to effect the change.
These files are on mirror.centos.org now and should be on all mirrors within a few hours.
The changes to the spec file for this build are now detailed in build/kernel-2.4.21-27.0.1.EL.centos3.spec.patch
This will make it easier to apply changes in the future and for CentOS users to see what has been changed.
Lance