No crash with recent 32-bit 5.6.12 from repositories on Debian: openxs@debian7:~/dbs/p5.6$ mysql -uroot -proot test Warning: Using a password on the command line interface can be insecure. Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 45 Server version: 5.6.12-rc60.4-log Percona Server (GPL), Release 60.4 Copyright (c) 2009-2013 Percona Ireland Ltd. Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> SELECT AES_ENCRYPT('','6b2d440b57b3bae74e3cf71e415b3965') FROM DUAL; +----------------------------------------------------+ | AES_ENCRYPT('','6b2d440b57b3bae74e3cf71e415b3965') | +----------------------------------------------------+ | ▌ZЦq÷▄ ╪JyйЗ | +----------------------------------------------------+ 1 row in set (0.06 sec) mysql> show variables like '%version%'; +-------------------------+------------------------------------+ | Variable_name | Value | +-------------------------+------------------------------------+ | innodb_version | 5.6.12-rc60.4 | | protocol_version | 10 | | slave_type_conversions | | | version | 5.6.12-rc60.4-log | | version_comment | Percona Server (GPL), Release 60.4 | | version_compile_machine | i686 | | version_compile_os | Linux | +-------------------------+------------------------------------+ 7 rows in set (0.00 sec) Will try to check on CentOS 6.x x86_64 later tonight or next week. As this has something to do with openssl, please, send the output of: ldd `which mysqld` This is what I have on system where it works: root@debian7:/home/openxs/dbs/p5.6# ldd `which mysqld` linux-gate.so.1 => (0xb77d6000) libpthread.so.0 => /lib/i386-linux-gnu/i686/cmov/libpthread.so.0 (0xb77b2000) libaio.so.1 => /lib/i386-linux-gnu/libaio.so.1 (0xb77af000) librt.so.1 => /lib/i386-linux-gnu/i686/cmov/librt.so.1 (0xb77a5000) libcrypt.so.1 => /lib/i386-linux-gnu/i686/cmov/libcrypt.so.1 (0xb7773000) libssl.so.1.0.0 => /usr/lib/i386-linux-gnu/i686/cmov/libssl.so.1.0.0 (0xb771b000) libcrypto.so.1.0.0 => /usr/lib/i386-linux-gnu/i686/cmov/libcrypto.so.1.0.0 (0xb755c000) libdl.so.2 => /lib/i386-linux-gnu/i686/cmov/libdl.so.2 (0xb7558000) libstdc++.so.6 => /usr/lib/i386-linux-gnu/libstdc++.so.6 (0xb746b000) libm.so.6 => /lib/i386-linux-gnu/i686/cmov/libm.so.6 (0xb7445000) libgcc_s.so.1 => /lib/i386-linux-gnu/libgcc_s.so.1 (0xb7428000) libc.so.6 => /lib/i386-linux-gnu/i686/cmov/libc.so.6 (0xb72c5000) /lib/ld-linux.so.2 (0xb77d7000) libz.so.1 => /lib/i386-linux-gnu/libz.so.1 (0xb72ac000)