An on-demand hotfix update package for SQL Server 2008 R2 SP1 was released on August 8, 2013. You can get more information from the KB listed below.
2868244 An on-demand hotfix update package is available for SQL Server 2008 R2 SP1
For the issues that fix in this CU, please refer to the below table:
KB article number
FIX: Access violation when you use a SQL profiler to trace an RPC event class in SQL Server 2008 or SQL Server 2008 R2
FIX: Access violation in replication Distribution Agent in SQL Server 2008 R2 Transactional Replication
FIX: A query that runs against a DMV enters an infinite loop in SQL Server 2008 R2, SQL Server 2008 or SQL Server 2012
For more information on SQL CU version, please refer to the following link:
For kb2803799, can a query for a plan_handle of a plan now retired from cache trigger the infinite loop?