June 11, 2024—KB5039266 (Security-only update)

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End of support information

Windows Server 2008 SP2 Extended Security Updates (ESU) third and final year ended on January 10, 2023. Additionally, Extended Security Updates on Azure only support ended on January 9, 2024. For more information, see Extended Security Updates for Windows Server overview.We recommend that you upgrade to a later version of Windows Server. For more information, see Overview of Windows Server upgrades.

Summary

Learn more about this security-only update, including improvements, any known issues, and how to get the update.

NOTEAs of July 2020, optional non-security releases for this operating system are no longer offered. Operating systems in extended support have only cumulative monthly security updates.Verify that you have installed the required updates in the How to get this update section before installing this update.For information about the various types of Windows updates, such as critical, security, driver, service packs, and so on, see Description of the standard terminology that is used to describe Microsoft software updates. To view other notes and messages for Windows Server 2008 SP2, see Windows Server 2008 SP2 update history.

Improvements

This update makes improvements for the following issues:

• A memory leak might occur in the Local Security Authority Subsystem Service (LSASS) during a Local Security Authority remote procedure call (LSARPC).
• The Local Security Authority Subsystem Service (LSASS) might crash after the April 9, 2024 security update (KB5036950) is installed.
  For more information about the resolved security vulnerabilities, please refer to the Deployments | Security Update Guide and the June 2024 Security Updates.

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Known issues in this update

Symptom	Next step
After installing this update and restarting your device, you might receive the error, “Failure to configure Windows updates. Reverting Changes. Do not turn off your computer”, and the update might show as Failed inUpdate History.	This is expected in the following circumstances:

• If you are installing this update on a device that is running an edition that is not supported for ESU. For a complete list of which editions are supported, see KB4497181.
• If you do not have an ESU MAK add-on key installed and activated.
  If you have an ESU key and have encountered this issue, please verify you have applied all prerequisites and that your key is activated. For information on activation, see the Obtaining Extended Security Updates for eligible Windows devices blog post. For information on the prerequisites, see the How to get this update section of this article.

How to get this update

Before installing this updateWe strongly recommend that you install the latest servicing stack update (SSU) for your operating system before you install the latest Monthly Rollup. SSUs improve the reliability of the update process to mitigate potential issues while installing the Monthly Rollup and applying Microsoft security fixes. For general information about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions.If you use Windows Update, the latest SSU (KB5039341) will be offered to you automatically. To get the standalone package for the latest SSU, search for it in the Microsoft Update Catalog.Language packsIf you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Learn about adding a language pack to Windows.Install this updateTo install this update, use one of the following release channels.

Windows UpdateUpdate CatalogServer Update Services

Available	Next step
No	This update is not available from Windows Update. See theUpdate CatalogorServer Update Services release channel.

Available	Next step
Yes	To get the standalone package for this update, go to the Microsoft Update Catalog website.To download updates from the Update Catalog, see Steps to download updates from the Windows Update Catalog.

Available	Next step
Yes	This update will automatically sync if you configureProducts and Classifications as follows:Product: Windows Server 2008 Service Pack 2Classification: Security UpdatesFor more information about configuring in WSUS, see Windows Server Update Services (WSUS).For more information about configuring in Configuration Manager, see Synchronize software updates.

REMINDER If you are using Security-only updates, you will also need to install all previous Security-only updates and the latest cumulative update for Internet Explorer (KB5034120).

File information

For a list of the files that are provided in this update, download the file information for update KB5039266.