I am installing an Oracle 18.104.22.168 Enterprise Edition on RHEL 6.4 I set it up with ASMM and HugePages (64G of RAM)
There may be a correlation between the errors and signing in to em express (not 100% certain yet). I mention this because of the following blog post with a similar error: http://surachartopun.com/2013/06/learn-something-wtih-12c-and-enjoy-bug.html
I have opened an SR already but wanted to see if anyone had thoughts on this.
Fri Aug 30 14:53:22 2013 Exception [type: SIGSEGV, Address not mapped to object] [ADDR:0x5] [PC:0xB71F161, qervwRowProcedure()+113] [flags: 0x0, count: 1] Errors in file /home/oracle/diag/rdbms/prdtdr1m/prdtdr1m/trace/prdtdr1m_s000_5987.trc (incident=33811): ORA-07445: exception encountered: core dump [qervwRowProcedure()+113] [SIGSEGV] [ADDR:0x5] [PC:0xB71F161] [Address not mapped to object]  Incident details in: /home/oracle/diag/rdbms/prdtdr1m/prdtdr1m/incident/incdir_33811/prdtdr1m_s000_5987_i33811.trc Use ADRCI or Support Workbench to package the incident. See Note 411.1 at My Oracle Support for error and packaging details. Fri Aug 30 14:53:24 2013 Dumping diagnostic data in directory=[cdmp_20130830145324], requested by (instance=1, osid=5987 (S000)), summary=[incident=33811]. Fri Aug 30 14:53:33 2013 Sweep [inc]: completed Sweep [inc2]: completed