Oracle 12c CDB database crash with ORA-600 INTERNAL_PLAN

I have installed Oracle 12c recently on linux x86 64bit linux server.  This is using new Container architecture (i.e CDB)

I connect to server and started using SQLplus ,whithin one minute of database open, i got connect lost error message,  when try to connect again, found database instance is no more, it was crashed.

I tried one more time to startup, just to see the behaviour as same results, it got crashed again as soon as database opened.

When checked the Alert.log found the following ORA-600 causing databse crash.

###############
Setting Resource Manager plan SCHEDULER[0x4459]:DEFAULT_MAINTENANCE_PLAN via scheduler window
Setting Resource Manager CDB plan DEFAULT_MAINTENANCE_PLAN via parameter
Errors in file /u01/app/oracle/diag/rdbms/cdb01/CDB01/trace/CDB01_dbrm_3506.trc  (incident=16873) (PDBNAME=PDB$SEED):
ORA-00600: internal error code, arguments: [kgskigetelt_subplan], [INTERNAL_PLAN], [], [], [], [], [], [], [], [], [], []
Incident details in: /u01/app/oracle/diag/rdbms/cdb01/CDB01/incident/incdir_16873/CDB01_dbrm_3506_i16873.trc
Use ADRCI or Support Workbench to package the incident.
See Note 411.1 at My Oracle Support for error and packaging details.
Fri Sep 18 01:33:58 2015
Errors in file /u01/app/oracle/diag/rdbms/cdb01/CDB01/trace/CDB01_dbrm_3506.trc:
ORA-00600: internal error code, arguments: [kgskigetelt_subplan], [INTERNAL_PLAN], [], [], [], [], [], [], [], [], [], []
Fri Sep 18 01:33:58 2015
Errors in file /u01/app/oracle/diag/rdbms/cdb01/CDB01/trace/CDB01_dbrm_3506.trc:
ORA-00600: internal error code, arguments: [kgskigetelt_subplan], [INTERNAL_PLAN], [], [], [], [], [], [], [], [], [], []
Fri Sep 18 01:33:58 2015
USER (ospid: 3506): terminating the instance due to error 56710
Fri Sep 18 01:33:58 2015
System state dump requested by (instance=1, osid=3506 (DBRM)), summary=[abnormal instance termination].
System State dumped to trace file /u01/app/oracle/diag/rdbms/cdb01/CDB01/trace/CDB01_diag_3504_20150918013358.trc
Fri Sep 18 01:33:59 2015
Dumping diagnostic data in directory=[cdmp_20150918013358], requested by (instance=1, osid=3506 (DBRM)), summary=[abnormal instance termination].
Fri Sep 18 01:33:59 2015
Instance terminated by USER, pid = 3506


Problem 

ORA-600:[kgskigetelt_subplan] . is due to bug and as of date(18 Sep 15) no patch or workaround available for this bug.

Bug 20479923 : ORA-00600:[KGSKIGETELT_SUBPLAN] FOLLOWED BY INSTANCE CRASH