We know the support matrix states it supports RHEL 7, not minor version specified. Just double check, does the siteminder 12.8 SP1 CR05 support RHEL OS 7.7 ?
Release : 12.8.03
Component : SITEMINDER -WEB AGENT FOR APACHE
In the siteminder 12.8 support matrix (https://ftpdocs.broadcom.com/phpdocs/7/5262/5262-12-8-platform-support-matrix.pdf), you will find this line:
"4. Red Hat AS, Red Hat ES, Red Hat Enterprise Linux and Red Hat Enterprise Linux Advanced Platform are supported with all Red Hat updates. Any problems reported will be fixed on the latest Red Hat update. Security Enhanced Red Hat Linux is supported, please see vendor’s documentation for setup instructions to enable third-party processes (such as Single Sign-On) to run on the system."
RHEL 7.7 should be supported for 12.8, and if there is a problem, support will have to work with engineering team to solve it. Although, I have not found any problems related to RHEL 7.7, and certainly no fatal ones.
We did not do a full QA test against RHEL7.7. We generally have and do not QA against minor releases of operating systems.
Please also note the following statement from Red Hat:
"Compatibility Within A Major Release
One of the core goals of the Red Hat Enterprise Linux family of products is to provide a stable, consistent runtime environment for third-party applications. To support this goal, Red Hat seeks to preserve application binary compatibility, configuration file compatibility, and data file compatibility for all package updates issued within a major release. For example, a package update from Red Hat Enterprise Linux 6.1 to Red Hat Enterprise Linux 6.2, or a package update that fixes an identified security vulnerability, should not break the functionality of deployed applications as long as they adhere to standard Application Binary Interfaces (ABIs)."