[CentOS] Recent CentOS4 kernel updates and CentOS Plus

If it wouldn't be too much trouble ... when a kernel security update
notice is posted to the announcements list, would it be possible to
indicate whether the centosplus kernel is also susceptible to the
security issue being patched?

I'm running the plus kernel now, and find myself wondering whether I
will ever need to back off to the base kernel because of security
issues.

Or is it reliably the case that centosplus gets updated along with the
base kernel whenever necessary if the upstream has released a security
fix?