Faulting application w3wp.exe, Faulting module name: OLEAUT32.dll version: 6.2.9200

We got multiple IIS crash on our production server, application hosted in iis8, .net framewoek 4.5 windows 2012 server. This issue occurred frequently on our server, and all session data of the logged user will expire immediately.Any assistance would be greatly appreciated
we are using crystal report
Error Log:

Faulting application name: w3wp.exe, version: 8.0.9200.16384, time stamp: 0x50108835
Faulting module name: OLEAUT32.dll, version: 6.2.9200.16384, time stamp: 0x50108a1d
Exception code: 0xc0000005
Fault offset: 0x00000000000017ac
Faulting process id: 0x7510
Faulting application start time: 0x01ced45c613df0e6
Faulting application path: c:\windows\system32\inetsrv\w3wp.exe
Faulting module path: C:\Windows\system32\OLEAU ...