Segfault of in.telnetd ( Requesting Core Dump analysis ).

Issue

• A segfault has been seen recently in in.telnetd on this system and 2 other systems with rhel 6.2.

Mar 17 17:03:33 localhost kernel: in.telnetd[18409]: segfault at 0 ip 00007f6d08305ec1 sp 00007ffff6b8fdb0 error 4 in in.telnetd[7f6d08300000+b000]
Mar 17 17:03:33 localhost abrt[18410]: saved core dump of pid 18409 (/usr/sbin/in.telnetd) to /var/spool/abrt/ccpp-2014-03-17-17:03:33-18409.new/coredump (397312 bytes)

[question]
Q1) why did telnet service receive signal=11 and why was it segfault?
Q2) Analyze coredump.
Q3) is it related to isc_ec_type(3rd party user process), which may cause telnet segfault?