Hi Chris,
this process is related to CIFS. I just had a quick look and found at least 2 open bugs :
Without more detailed troubleshooting it's impossible to say but it might be e.g.:
CSCtf28464 Memory Leak In CIFS can casue memory depletion
However, do I understand correctly that you removed all webvpn config and you still see the same problem? That would not make sense.
In any case, unless you can open a TAC service request to investigate more in-depth, I would suggest downgrading to 8.0(5), assuming you can live without the new features in 8.2
hth
Herbert