After upgrading QAS from 126.96.36.199 to 188.8.131.5226 we started seeing these errors from QAS:
Updating : BACvas 3/6*** glibc detected *** /opt/quest/libexec/vas/vasd/.vasac_helper: double free or corruption (out): 0x000000000cab0080 ***
They were running into the following issue that has been resolved as of QAS 184.108.40.20675:
The issue can be temporarily worked around by disabling the expand-ac-groups option in your vas.conf file.
Issue fixed in version 220.127.116.1175 and later. Please upgrade to the latest version of QAS.