IBM BigFix Patch supports Red Hat Enterprise Linux 5, Red Hat Enterprise Linux 6, and Red Hat Enterprise Linux 7. For detailed information, see https://ibm.biz/BdHGkg.
The BigFix patching process is similar among the versions and flavors for Red Hat Enterprise Linux. However, the change in the management services for Red Hat Enterprise Linux 7 might have an impact on how the patches are retrieved. Since Red Hat has moved to a new subscription management for RHEL 7 (see https://access.redhat.com/articles/63269 for more information), you might face issues with your entitlements or subscriptions.
To know more, check out the article on RHEL 7 patching at https://ibm.biz/BdHnFU.