search google with this "CRS 10.2.0.3 patch sert"
2nd hit which says "10.2 0.3 patch set for oracle database server" goes to patch download. You need metalink id for that.

patch 5337014 (10g Release 2 (10.2.0.3) Patch Set 2 for HP-UX Itanium)

check readme file for that patch 5337014 it says

You can apply the Oracle Database release 10.2.0.3 patch set to the following Oracle Database 10g release 2 installations:
Oracle Database
Oracle Real Application Clusters
Oracle Database Client
Oracle Database Companion CD
Oracle Clusterware

Hope this helps