A memory leak occurs on an RPC server that is running Windows Server 2008 after the RPC server function runs an RPC client callback function

Article ID: 949887 - View products that this article applies to.
Support for Windows Vista Service Pack 1 (SP1) ends on July 12, 2011. To continue receiving security updates for Windows, make sure you're running Windows Vista with Service Pack 2 (SP2). For more information, refer to this Microsoft web page: Support is ending for some versions of Windows
(http://windows.microsoft.com/en-us/windows/help/end-support-windows-xp-sp2-windows-vista-without-service-packs)
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SYMPTOMS

Consider the following scenario:
  • You make a remote procedure call (RPC) request on a Windows-based client to connect to an RPC server.
  • The RPC server is running Windows Server 2008.
  • The RPC server function runs an RPC client callback function on the RPC server.
In this scenario, a memory leak occurs on the RPC server.
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CAUSE

The issue occurs because of a bug in the Rpcrt4.dll file. When an RPC client makes a call to an RPC server function, the RPC server function runs an RPC callback function that cannot free the callback reply buffer. This behavior causes a memory leak on the RPC server.
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RESOLUTION

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support
(http://support.microsoft.com/contactus/?ws=support)
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Important Windows Vista and Windows Server 2008 hotfixes are included in the same packages. However, only one of these products may be listed on the “Hotfix Request” page. To request the hotfix package that applies to both Windows Vista and Windows Server 2008, just select the product that is listed on the page.

Prerequisites

To apply this hotfix, you must have Windows Server 2008 installed on the RPC server.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
Windows Server 2008, x86-based versions and Windows Vista, x86-based versions
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File nameFile versionFile sizeDateTimePlatform
Package_1_for_kb949887~31bf3856ad364e35~x86~~6.0.2.0.mumNot applicable1,77725-Mar-200819:31Not applicable
Package_2_for_kb949887~31bf3856ad364e35~x86~~6.0.2.0.mumNot applicable1,94425-Mar-200819:31Not applicable
Package_3_for_kb949887~31bf3856ad364e35~x86~~6.0.2.0.mumNot applicable1,78225-Mar-200819:31Not applicable
Package_4_for_kb949887~31bf3856ad364e35~x86~~6.0.2.0.mumNot applicable1,78225-Mar-200819:31Not applicable
Package_5_for_kb949887~31bf3856ad364e35~x86~~6.0.2.0.mumNot applicable1,78225-Mar-200819:31Not applicable
Package_6_for_kb949887~31bf3856ad364e35~x86~~6.0.2.0.mumNot applicable1,77825-Mar-200819:31Not applicable
Package_for_kb949887_client_0~31bf3856ad364e35~x86~~6.0.2.0.mumNot applicable1,42625-Mar-200819:31Not applicable
Package_for_kb949887_client_1~31bf3856ad364e35~x86~~6.0.2.0.mumNot applicable1,36725-Mar-200819:31Not applicable
Package_for_kb949887_client~31bf3856ad364e35~x86~~6.0.2.0.mumNot applicable1,71325-Mar-200819:31Not applicable
Package_for_kb949887_sc_0~31bf3856ad364e35~x86~~6.0.2.0.mumNot applicable1,42125-Mar-200819:31Not applicable
Package_for_kb949887_sc~31bf3856ad364e35~x86~~6.0.2.0.mumNot applicable1,42325-Mar-200819:31Not applicable
Package_for_kb949887_server_0~31bf3856ad364e35~x86~~6.0.2.0.mumNot applicable1,42525-Mar-200819:31Not applicable
Package_for_kb949887_server~31bf3856ad364e35~x86~~6.0.2.0.mumNot applicable1,43125-Mar-200819:31Not applicable
Package_for_kb949887_winpesrv_0~31bf3856ad364e35~x86~~6.0.2.0.mumNot applicable1,42225-Mar-200819:31Not applicable
Package_for_kb949887_winpesrv~31bf3856ad364e35~x86~~6.0.2.0.mumNot applicable1,43025-Mar-200819:31Not applicable
Package_for_kb949887_winpe_0~31bf3856ad364e35~x86~~6.0.2.0.mumNot applicable1,42025-Mar-200819:31Not applicable
Package_for_kb949887_winpe~31bf3856ad364e35~x86~~6.0.2.0.mumNot applicable1,42425-Mar-200819:31Not applicable
X86_7bceec965d6feac0cad6a013cbc4b3b7_31bf3856ad364e35_6.0.6001.22142_none_df658896c7cc6786.manifestNot applicable69725-Mar-200819:31Not applicable
X86_a4baa9baeaffdf10a0ffb6cca9ff2c6c_31bf3856ad364e35_6.0.6000.20798_none_88a59e86c6058042.manifestNot applicable69725-Mar-200819:31Not applicable
X86_microsoft-windows-rpc-local_31bf3856ad364e35_6.0.6000.20798_none_b244b040614d2469.manifestNot applicable27,57123-Mar-200805:39Not applicable
X86_microsoft-windows-rpc-local_31bf3856ad364e35_6.0.6001.22142_none_b45afcc65e50919b.manifestNot applicable28,51525-Mar-200803:46Not applicable
Rpcrt4.dll6.0.6000.20798788,99222-Mar-200803:36x86
Rpcrt4.dll6.0.6001.22142784,89625-Mar-200803:18x86
Windows Server 2008, x64-based versions and Windows Vista, x64-based versions
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File nameFile versionFile sizeDateTimePlatform
Amd64_826f4cd3425d2870ae1b5e630a813964_31bf3856ad364e35_6.0.6001.22142_none_d9994a4996bda865.manifestNot applicable70125-Mar-200819:31Not applicable
Amd64_900682b7234b5551f920e41b832a14dc_31bf3856ad364e35_6.0.6001.22142_none_1c44df8089908343.manifestNot applicable1,04425-Mar-200819:31Not applicable
Amd64_df6f3015c18b238c85218fa9422e8508_31bf3856ad364e35_6.0.6000.20798_none_4608140c7dc0e64c.manifestNot applicable70125-Mar-200819:31Not applicable
Amd64_eb3f2250f2b457d795d17eeda2588100_31bf3856ad364e35_6.0.6000.20798_none_750ff946f668870e.manifestNot applicable1,04425-Mar-200819:31Not applicable
Amd64_microsoft-windows-rpc-local_31bf3856ad364e35_6.0.6000.20798_none_0e634bc419aa959f.manifestNot applicable27,61123-Mar-200806:07Not applicable
Amd64_microsoft-windows-rpc-local_31bf3856ad364e35_6.0.6001.22142_none_1079984a16ae02d1.manifestNot applicable28,55525-Mar-200804:26Not applicable
Package_1_for_kb949887~31bf3856ad364e35~amd64~~6.0.2.0.mumNot applicable1,78725-Mar-200819:31Not applicable
Package_2_for_kb949887~31bf3856ad364e35~amd64~~6.0.2.0.mumNot applicable2,17325-Mar-200819:31Not applicable
Package_3_for_kb949887~31bf3856ad364e35~amd64~~6.0.2.0.mumNot applicable2,00925-Mar-200819:31Not applicable
Package_4_for_kb949887~31bf3856ad364e35~amd64~~6.0.2.0.mumNot applicable2,00925-Mar-200819:31Not applicable
Package_5_for_kb949887~31bf3856ad364e35~amd64~~6.0.2.0.mumNot applicable2,00925-Mar-200819:31Not applicable
Package_6_for_kb949887~31bf3856ad364e35~amd64~~6.0.2.0.mumNot applicable1,78825-Mar-200819:31Not applicable
Package_for_kb949887_client_0~31bf3856ad364e35~amd64~~6.0.2.0.mumNot applicable1,43425-Mar-200819:31Not applicable
Package_for_kb949887_client_1~31bf3856ad364e35~amd64~~6.0.2.0.mumNot applicable1,37525-Mar-200819:31Not applicable
Package_for_kb949887_client~31bf3856ad364e35~amd64~~6.0.2.0.mumNot applicable1,72325-Mar-200819:31Not applicable
Package_for_kb949887_sc_0~31bf3856ad364e35~amd64~~6.0.2.0.mumNot applicable1,42925-Mar-200819:31Not applicable
Package_for_kb949887_sc~31bf3856ad364e35~amd64~~6.0.2.0.mumNot applicable1,43125-Mar-200819:31Not applicable
Package_for_kb949887_server_0~31bf3856ad364e35~amd64~~6.0.2.0.mumNot applicable1,43325-Mar-200819:31Not applicable
Package_for_kb949887_server~31bf3856ad364e35~amd64~~6.0.2.0.mumNot applicable1,43925-Mar-200819:31Not applicable
Package_for_kb949887_winpesrv_0~31bf3856ad364e35~amd64~~6.0.2.0.mumNot applicable1,43025-Mar-200819:31Not applicable
Package_for_kb949887_winpesrv~31bf3856ad364e35~amd64~~6.0.2.0.mumNot applicable1,43825-Mar-200819:31Not applicable
Package_for_kb949887_winpe_0~31bf3856ad364e35~amd64~~6.0.2.0.mumNot applicable1,42825-Mar-200819:31Not applicable
Package_for_kb949887_winpe~31bf3856ad364e35~amd64~~6.0.2.0.mumNot applicable1,43225-Mar-200819:31Not applicable
Wow64_microsoft-windows-rpc-local_31bf3856ad364e35_6.0.6000.20798_none_18b7f6164e0b579a.manifestNot applicable25,19723-Mar-200805:31Not applicable
Wow64_microsoft-windows-rpc-local_31bf3856ad364e35_6.0.6001.22142_none_1ace429c4b0ec4cc.manifestNot applicable26,14125-Mar-200803:34Not applicable
Rpcrt4.dll6.0.6000.207981,287,16822-Mar-200803:47x64
Rpcrt4.dll6.0.6001.221421,319,93625-Mar-200803:49x64
Rpcrt4.dll6.0.6000.20798672,25622-Mar-200803:37x86
Rpcrt4.dll6.0.6001.22142677,88825-Mar-200803:19x86
Windows Server 2008, IA-64-based versions and Windows Vista, IA-64-based versions
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Ia64_4cfb58341e345cdfeb671a5916a6ca28_31bf3856ad364e35_6.0.6001.22142_none_75cdcdc1a3fe5dbf.manifestNot applicable69925-Mar-200819:31Not applicable
Ia64_fc0ebcca297ac65e98ea2311e31311b4_31bf3856ad364e35_6.0.6001.22142_none_f48c0484e936d8ba.manifestNot applicable1,04225-Mar-200819:31Not applicable
Ia64_microsoft-windows-rpc-local_31bf3856ad364e35_6.0.6001.22142_none_b45ca0bc5e4e9a97.manifestNot applicable28,53325-Mar-200804:04Not applicable
Package_1_for_kb949887~31bf3856ad364e35~ia64~~6.0.2.0.mumNot applicable1,78225-Mar-200819:31Not applicable
Package_2_for_kb949887~31bf3856ad364e35~ia64~~6.0.2.0.mumNot applicable2,00425-Mar-200819:31Not applicable
Package_3_for_kb949887~31bf3856ad364e35~ia64~~6.0.2.0.mumNot applicable2,00425-Mar-200819:31Not applicable
Package_for_kb949887_sc_0~31bf3856ad364e35~ia64~~6.0.2.0.mumNot applicable1,42525-Mar-200819:31Not applicable
Package_for_kb949887_sc~31bf3856ad364e35~ia64~~6.0.2.0.mumNot applicable1,42625-Mar-200819:31Not applicable
Package_for_kb949887_server_0~31bf3856ad364e35~ia64~~6.0.2.0.mumNot applicable1,42925-Mar-200819:31Not applicable
Package_for_kb949887_server~31bf3856ad364e35~ia64~~6.0.2.0.mumNot applicable1,43425-Mar-200819:31Not applicable
Package_for_kb949887_winpesrv_0~31bf3856ad364e35~ia64~~6.0.2.0.mumNot applicable1,42625-Mar-200819:31Not applicable
Package_for_kb949887_winpesrv~31bf3856ad364e35~ia64~~6.0.2.0.mumNot applicable1,43325-Mar-200819:31Not applicable
Wow64_microsoft-windows-rpc-local_31bf3856ad364e35_6.0.6001.22142_none_1ace429c4b0ec4cc.manifestNot applicable26,14125-Mar-200803:34Not applicable
Rpcrt4.dll6.0.6001.221423,304,96025-Mar-200803:36IA-64
Rpcrt4.dll6.0.6001.22142677,88825-Mar-200803:19x86
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STATUS

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

Article ID: 949887 - Last Review: June 10, 2011 - Revision: 2.4
APPLIES TO
  • Windows Server 2008 Datacenter
  • Windows Server 2008 Enterprise
  • Windows Server 2008 Standard
  • Windows Vista Business
  • Windows Vista Enterprise
  • Windows Vista Home Basic
  • Windows Vista Home Premium
  • Windows Vista Starter
  • Windows Vista Ultimate
  • Windows Vista Service Pack 1
Keywords: 
kbautohotfix kbexpertiseinter kbqfe kbHotfixServer KB949887
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