Windows Server 2008 R2 domain controller crashes when two threads use the same LDAP connection

Applies to: Windows Server 2008 R2 Service Pack 1Windows Server 2008 R2 DatacenterWindows Server 2008 R2 Enterprise


This update fixes an access violation on the LSASS.exe process. This issue occurs because the Lightweight Directory Access Protocol (LDAP) connection is disconnected and reset from another thread. Before you install this update, see the Prerequisites section.

How to get this update

Microsoft Update Catalog

To fix this issue, install this update from the Microsoft Update Catalog website.

Update detail information


To apply this update, you must have Service Pack 1 for Windows 7 or Windows Server 2008 R2 installed.

Registry information

To use the update in this package, you don't have to make any changes to the registry.

Restart requirement

You may have to restart the computer after you apply this update.

Update replacement information

This update doesn't replace a previously released update.

File Information

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


Learn about the terminology that Microsoft uses to describe software updates.