ORA-7445 [kssdct()] Followed BY ORA-602, ORA-7445 [kssdch()] From PMON Crashing The Instance
Last updated on FEBRUARY 07, 2014
Applies to:Oracle Database - Enterprise Edition - Version 10.2.0.5 to 22.214.171.124 [Release 10.2 to 11.2]
Information in this document applies to any platform.
***Checked for relevance on 29-Jun-2013***
When attempting to cleanup after a SQL*Net connection is terminated, the following error occurs:
and then the instance is terminated, due to PMON reporting the below errors:
ORA-07445: exception encountered: core dump [kssdch()+2188] [SIGSEGV] [Address not mapped to object] [0x00000241E]  
The call stack for the ORA-7445 [kssdct()] error will resemble the following:
An upgrade to 10.2.0.5 has been performed, or a one-off patch containing the fix for <Bug 6887866> has been applied.
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