w3w3.exe file crashed in IIS and session of all users gets expired

My MVC application is hosted in Windows server 2008 R2 Standard. Its been couple of months that w3wp.exe crash message is being appeared in event logs of my application server because of which session of all the users getting expired (most probably because w3wp.exe crash causing the app pool to restart). Following is the message that i can see in event viewer:

Faulting application name: w3wp.exe, version: 7.5.7601.17514, time stamp: 0x4ce7a5f8
Faulting module name: iiscore.dll, version: 7.5.7601.17514, time stamp: 0x4ce7b859
Exception code: 0xc0000005
Fault offset: 0x00023875
Faulting process id: 0x1d94
Faulting application start time: 0x01d54168d7a35c2b
Faulting application path: C:\Windows\SysWOW64\inetsrv\w3wp.exe
Faulting module path: C:\Windows\system32\inetsrv\iiscore.dll
Report Id: c25a6043-ad5c-11e9-a88e-080027450bda

As i could not get any clear reason of this exception/crash, so i installed the DebugDiag version 1.2 in server and i also got the dump files created in server. Unfortunately i could not understand what is causing this issue even after reading the dump files. FOllowing is the error message that i can see in the top of the dump file:

In W3805E~1.DMP the assembly instruction at iiscore!CONTEXT_CONTAINER::GetModuleContext+12 in C:\Windows\System32\inetsrv\iiscore.dll from Microsoft Corporation has caused an access violation exception (0xC0000005) when trying to read from memory location 0x0000004c on thread 8

Here is what i can see in dump files:

DumpFile part-1 Dump File part-2

Can anyone please help me to understand the main reason of the issue ? Your help is hearty appreciated. Thanks in advance.