Asterisk Segfault with CPA Patch

I am having an issue with segfaults occurring after applying the 1.4.21.2 patch.
The system runs perfectly without the modified chan_sip module and only experiences the segfault after the patch has been applied.
After doing a quick backtrace is seems that the faulting line is 12225 in chan_sip.c, and it is the exact same fault every time.
As a side note, the issue seems to happen randomly. Sometimes it's after several hours of dialing, sometimes after only 20 minutes. There are no other errors aside from the segfault.
The system is an Appro server with dual xeon and 4GB of ram. The system is SIP only, with the following call flow:
PBX => CPA => AsteriskB2BUA => voip provider
There are other systems simultaneously using the perimeter facilities and they do not fail, nor are there any other visible errors. It seems isolated to only the CPA patched systems.
VD Version: 2.0.5
Ast Version: 1.4.21.2
Let me know if any other info is needed.
The system runs perfectly without the modified chan_sip module and only experiences the segfault after the patch has been applied.
After doing a quick backtrace is seems that the faulting line is 12225 in chan_sip.c, and it is the exact same fault every time.
As a side note, the issue seems to happen randomly. Sometimes it's after several hours of dialing, sometimes after only 20 minutes. There are no other errors aside from the segfault.
The system is an Appro server with dual xeon and 4GB of ram. The system is SIP only, with the following call flow:
PBX => CPA => AsteriskB2BUA => voip provider
There are other systems simultaneously using the perimeter facilities and they do not fail, nor are there any other visible errors. It seems isolated to only the CPA patched systems.
VD Version: 2.0.5
Ast Version: 1.4.21.2
Let me know if any other info is needed.