Hi,
Yes, as per the support matrix it is not the supported version of RHEL with ColdFusion 10. The problem that you will come across when you will configure the connector with RHEL 6.3 and CF 10 with Apache, the connector binaries won't work beause of the compatiblity issue. However you can try this artcile if that helps.
http://helpx.adobe.com/coldfusion/kb/rhel-connector-configuration.html
Regards,
Priyank