On January 27, 2015 VMware released new patches for vSphere 5.5, vCenter 5.5 Update 2d, and ESXi 5.5 update 2d.
One of the resolved items in ESXi 5.5 Update 2, is the CBT bug, seen in this VMware KB: http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2090639 This KB is not updated, with this information at the moment, but it is in one of the release notes for the patch: http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2099266
This means that there are patches for the CBT bug, to vSphere 5.0, 5.1 and 5.5.
the release notes for the vCenter 5.5 Update 2d is here: https://www.vmware.com/support/vsphere5/doc/vsphere-vcenter-server-55u2d-release-notes.html
I have not tested this new patches yet.