There is an updated kernel for CentOS-3.1
https://rhn.redhat.com/errata/RHSA-2004-183.html refers.
Updated files are :-
all in updates/i386/RPMS/
kernel-2.4.21-9.0.3.EL.c0.athlon.rpm kernel-2.4.21-9.0.3.EL.c0.i686.rpm kernel-BOOT-2.4.21-9.0.3.EL.c0.i386.rpm kernel-doc-2.4.21-9.0.3.EL.c0.i386.rpm kernel-hugemem-2.4.21-9.0.3.EL.c0.i686.rpm kernel-hugemem-unsupported-2.4.21-9.0.3.EL.c0.i686.rpm kernel-smp-2.4.21-9.0.3.EL.c0.athlon.rpm kernel-smp-2.4.21-9.0.3.EL.c0.i686.rpm kernel-smp-unsupported-2.4.21-9.0.3.EL.c0.athlon.rpm kernel-smp-unsupported-2.4.21-9.0.3.EL.c0.i686.rpm kernel-source-2.4.21-9.0.3.EL.c0.i386.rpm kernel-unsupported-2.4.21-9.0.3.EL.c0.athlon.rpm kernel-unsupported-2.4.21-9.0.3.EL.c0.i686.rpm
These are available at http://mirror.centos.org/3.1/ and should be on all mirrors within a few hours.
To update to the latest version 'yum update kernel' should be sufficient.
In addition CentOS now has a set of i586 rpms in the new 'contrib directory'
To access contrib add the following stanza to yum.conf :-
[contrib] name=CentOS-$releasever - Contrib baseurl=http://mirror.centos.org/centos/$releasever/contrib/$basearch/ gpgcheck=0
Note that [contrib] rpms are provided by third parties and not necessarily tested by cAos/CentOS developers. They are not signed and thus gpgcheck is 0 for the stanza.
Lance