This article describes a memory leak issue that occurs in the svhdxflt.sys filter driver in Windows Server 2012 R2. The leak occurs against nonpaged pool with the svxp tag. You can fix this issue by using the update in this article. Before you install this update, see the Prerequisites and the Restart requirement section.

How to obtain this update

Important If 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 Add language packs to Windows.

Method 1: Windows Update

This update is provided as a Recommended update on Windows Update. For more information on how to run Windows Update, see How to get an update through Windows Update.

Method 2: Microsoft Download Center

The update is available for download from the Microsoft Download Center:

Download Download the Windows Server 2012 R2 package now.

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to obtain Microsoft support files from online services Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

Update detail information

Prerequisites

To apply this update, you must have April 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (2919355) installed in Windows Server 2012 R2.

Registry information

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

Restart requirement

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

Update replacement information

This update doesn't replace a previously released update.

Status

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

References

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

File Information

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and times for these files are listed in Coordinated Universal Time (UTC). Be aware that dates and times for these files on your local computer are displayed in your local time and with your current daylight saving time bias. The dates and times may also change when you perform certain operations on the files.

Notes

  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Milestone

    Service branch

    6.3.960 0.18 xxx

    Windows Server 2012 R2

    RTM

    GDR

  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.

  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed in the "Additional file information" section. MUM, MANIFEST, and the associated security catalog (.cat) files, are very important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

x64 Windows Server 2012 R2

File name

File version

File size

Date

Time

Platform

Svhdxflt.sys

6.3.9600.18185

155,136

30-Dec-2015

14:48

x64


x64 Windows Server 2012 R2

File property

Value

File name

Amd64_aedeeedec8c63a6f30b6e313646fc3aa_31bf3856ad364e35_6.3.9600.18185_none_492eb0ff11f907ad.manifest

File version

Not applicable

File size

721

Date (UTC)

30-Dec-2015

Time (UTC)

22:31

Platform

Not applicable

File name

Amd64_microsoft-windows-f..uster-svhdxflt-core_31bf3856ad364e35_6.3.9600.18185_none_cb8a2a351a3104dd.manifest

File version

Not applicable

File size

4,505

Date (UTC)

30-Dec-2015

Time (UTC)

15:35

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

1,595

Date (UTC)

30-Dec-2015

Time (UTC)

22:31

Platform

Not applicable


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