How to overcome Apache crash on Mandriva?

Question

linux

By the will of fate, I ran into a server on which Mandriva 2010 is installed.
The problem is this:
when using more than eight placeholders, the Apache fork crashes...

$db->rows("SELECT * FROM A WHERE B_ID IN (?,?,?,?,?,?,?,?,?)", array(1,2,3,4,5,6,7,8,9));

At eight or less, everything works ...

$ gdb httpd  /tmp/core.5075
......
Core was generated by `/usr/sbin/httpd -f /etc/httpd/conf/httpd.conf -DAPACHE2 -DHAVE_AUTHZ_SVN -DHAVE'.
Program terminated with signal 11, Segmentation fault.
#0  0x00007f755eab7a19 in ?? () from /usr/lib64/php/extensions/pdo_firebird.so
Missing debug package(s), you should install: apache-debug-2.2.22-0.1mdv2010.2.x86_64

I suspect that the bug is in the php-pdo_firebird-5.3.2-1mdv2010.1.x86_64.rpm package.
So, the question is: how to update it with little bloodshed? Is it possible for Mandriva2010 to use rpm sources for newer versions? How?
I can’t update the axis, important software is running on the server ...