[rhelv6-list] ksh crashes since update tp RHEL 6.7

[Alois Treindl]

The update to RHEL 6.7 installed
Jul 25 17:51:52 Updated: ksh-20120801-28.el6.x86_64
(previous was ksh-20120801-21.el6_6.3.x86_64)

Since then, a shell script with ran since many years frequently and 
which specifies #! /bin/ksh
as its shell, crashes.

I get a syslog entry
kernel: txfeed[21051] general protection ip:4dd304 sp:7ffc9b599fc0 
error:0 in ksh93[400000+15d000]

ksh93 is the executable, linked symbolically from /bin/ksh via 
/etc/alternatives/ksh

I fixed the problem by replacing the shell with /bin/bash but I wonder 
what the real cause might be.