ORA-7445 is an unhandled exception error due to an OS exception which should result in the creation of a core file.  An ORA-7445 is a generic error, and can occur from anywhere in the Oracle code. The precise location of the error is identified by the core file and/or trace file it produces.

I received an OEM alert with below error:
Exception [type: SIGSEGV, SI_KERNEL(general_protection)] [ADDR:0x0] [PC:0x298B7A3, msq_preprocess_frocol()+355] [flags: 0x0, count: 1]~Errors in file /logs/oracle_logs/mydb/diag/rdbms/mydb/mydb/trace/mydb_ora_32193.trc (incident=793998):~ORA-07445: exception encountered: core dump [msq_preprocess_frocol()+355] [SIGSEGV] [ADDR:0x0] [PC:0x298B7A3] [SI_KERNEL(general_protection)] []~Incident details in: /logs/oracle_logs/mydb/diag/rdbms/mydb/mydb/incident/incdir_793998/mydb_ora_32193_i793998.trc~Use ADRCI or Support Workbench to package the incident.~See Note 411.1 at My Oracle Support for error and packaging details.

There is an Oracle Note for this error:
ORA-600/ORA-7445/ORA-700 Error Look-up Tool (Doc ID 153788.1)

You can also refer to below Oracle Note that discusses a worked example of ORA-07445.
Introduction to 600/7445 Internal Error Analysis (Doc ID 390293.1)

Download latest version of Trace File Analyzer (TFA) & ORAchk/EXAchk from below:
TFA Collector – TFA with Database Support Tools Bundle (Doc ID 1513912.1)

The tool is part of Autonomous Health Framework.

Installation Instructions

This must be completed for each node of a cluster.

1) Copy the zip file to a target machine and unzip
2) Run the command: ahf_setup

For advanced installation options see the User Guide https://docs.oracle.com/en/engineered-systems/health-diagnostics/autonomous-health-framework/ahfug/index.html

Run Diagnostic Collection

tfactl diagcollect -srdc ORA-00600
tfactl diagcollect -srdc ORA-07445
tfactl diagcollect -srdc ORA-00700

Use the troubleshooting tool on my oracle support to diagnose the error.

ORA-7445-Troubleshooting Tool
https://support.oracle.com/epmos/faces/ui/gr/GrHome.jspx?parent=DOCUMENT&sourceId=153788.1&domainId=ORA7445