After applying the necessary CA maintenance for compatibility with z/OS 2.3, CICS regions are experiencing abends and errors. ENF is issuing a CAS9578E message stating a S0C4 abend is occurring in product KO50. Specifically, in this case, product KO50 is CA Top Secret.
CICS region security established using CA Top Secret through the CA Common Services for z/OS CAENF/CICS component.
CAENF cannot establish it's security intercepts due to an abend in the CA product in control at a CAENF/CICS intercept point.
Essentially the CAS9578E message is CAENF reporting that it can't continue processing due to the abend in the product named in the message. Contact the CA product's customer support for a resolution.