CentOS Errata and Security Advisory 2008:0235
https://rhn.redhat.com/errata/RHSA-2008-0235.html
The following updated files have been uploaded and are currently syncing to the mirrors:
i386: speex-1.0.4-4.el4_6.1.i386.rpm speex-devel-1.0.4-4.el4_6.1.i386.rpm
src: speex-1.0.4-4.el4_6.1.src.rpm