Symptoms
Consider the following scenario:
- You run a third-party application on a computer that is running Windows 7 or Windows Server 2008 R2.
- The application uses the Windows Filtering Platform (WFP) callout driver or the Network Driver Interface Specification (NDIS) Lightweight Filters (LWF) driver.
- The application uses the FwpsNetBufferListAssociateContext0 function to associate the driver’s context and a Net Buffer List (NBL).
Cause
This issue occurs because the FwpsNetBufferListRemoveContext0 function does not free the context of a WFP callout driver or NDIS LWF driver that is associated with an NBL.
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 the problem described in this article. 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 website: 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.
Prerequisites
To apply this hotfix, you must be running one of the following operating systems:- Windows 7
- Windows 7 Service Pack 1 (SP1)
- Windows Server 2008 R2
- Windows Server 2008 R2 Service Pack 1 (SP1)
Registry information
To apply this hotfix, you do not have to make any changes to the registry.Restart requirement
You must restart the computer after you apply this hotfix.Hotfix replacement information
This hotfix does not replace a previously released hotfix.Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
More Information
For more information about the FwpsNetBufferListAssociateContext0 function, go to the following Microsoft website:For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
Additional file information
Additional file information for Windows 7 and for Windows Server 2008 R2
Additional files for all supported x86-based versions of Windows 7
| File name | X86_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.17939_none_58923ff3139b4b9b.manifest |
| File version | Not applicable |
| File size | 2,540 |
| Date (UTC) | 22-Aug-2012 |
| Time (UTC) | 17:35 |
| Platform | Not applicable |
| File name | X86_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22176_none_58ed74522cdc4266.manifest |
| File version | Not applicable |
| File size | 2,540 |
| Date (UTC) | 29-Nov-2012 |
| Time (UTC) | 06:08 |
| Platform | Not applicable |
| File name | X86_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7600.17178_none_b3021eabc7af25ce.manifest |
| File version | Not applicable |
| File size | 3,834 |
| Date (UTC) | 29-Nov-2012 |
| Time (UTC) | 05:28 |
| Platform | Not applicable |
| File name | X86_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7600.21385_none_b37dec92e0d792ab.manifest |
| File version | Not applicable |
| File size | 3,834 |
| Date (UTC) | 29-Nov-2012 |
| Time (UTC) | 05:14 |
| Platform | Not applicable |
| File name | X86_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.18014_none_b5255bf7c4a881df.manifest |
| File version | Not applicable |
| File size | 3,834 |
| Date (UTC) | 29-Nov-2012 |
| Time (UTC) | 05:48 |
| Platform | Not applicable |
| File name | X86_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.22176_none_b57019ceddf4fbfd.manifest |
| File version | Not applicable |
| File size | 3,834 |
| Date (UTC) | 29-Nov-2012 |
| Time (UTC) | 06:12 |
| Platform | Not applicable |
Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
| File name | Amd64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.17939_none_b4b0db76cbf8bcd1.manifest |
| File version | Not applicable |
| File size | 2,542 |
| Date (UTC) | 22-Aug-2012 |
| Time (UTC) | 18:33 |
| Platform | Not applicable |
| File name | Amd64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22176_none_b50c0fd5e539b39c.manifest |
| File version | Not applicable |
| File size | 2,542 |
| Date (UTC) | 29-Nov-2012 |
| Time (UTC) | 06:55 |
| Platform | Not applicable |
| File name | Amd64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7600.17178_none_0f20ba2f800c9704.manifest |
| File version | Not applicable |
| File size | 3,838 |
| Date (UTC) | 29-Nov-2012 |
| Time (UTC) | 06:33 |
| Platform | Not applicable |
| File name | Amd64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7600.21385_none_0f9c8816993503e1.manifest |
| File version | Not applicable |
| File size | 3,838 |
| Date (UTC) | 29-Nov-2012 |
| Time (UTC) | 06:13 |
| Platform | Not applicable |
| File name | Amd64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.18014_none_1143f77b7d05f315.manifest |
| File version | Not applicable |
| File size | 3,838 |
| Date (UTC) | 29-Nov-2012 |
| Time (UTC) | 06:53 |
| Platform | Not applicable |
| File name | Amd64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.22176_none_118eb55296526d33.manifest |
| File version | Not applicable |
| File size | 3,838 |
| Date (UTC) | 29-Nov-2012 |
| Time (UTC) | 07:02 |
| Platform | Not applicable |
| File name | Wow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.17939_none_bf0585c900597ecc.manifest |
| File version | Not applicable |
| File size | 1,166 |
| Date (UTC) | 22-Aug-2012 |
| Time (UTC) | 17:23 |
| Platform | Not applicable |
| File name | Wow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22176_none_bf60ba28199a7597.manifest |
| File version | Not applicable |
| File size | 1,166 |
| Date (UTC) | 29-Nov-2012 |
| Time (UTC) | 05:51 |
| Platform | Not applicable |
Additional files for all supported IA-64-based versions of Windows Server 2008 R2
| File name | Ia64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.17939_none_5893e3e913995497.manifest |
| File version | Not applicable |
| File size | 2,541 |
| Date (UTC) | 22-Aug-2012 |
| Time (UTC) | 18:25 |
| Platform | Not applicable |
| File name | Ia64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22176_none_58ef18482cda4b62.manifest |
| File version | Not applicable |
| File size | 2,541 |
| Date (UTC) | 29-Nov-2012 |
| Time (UTC) | 06:47 |
| Platform | Not applicable |
| File name | Ia64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7600.17178_none_b303c2a1c7ad2eca.manifest |
| File version | Not applicable |
| File size | 3,836 |
| Date (UTC) | 29-Nov-2012 |
| Time (UTC) | 06:37 |
| Platform | Not applicable |
| File name | Ia64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7600.21385_none_b37f9088e0d59ba7.manifest |
| File version | Not applicable |
| File size | 3,836 |
| Date (UTC) | 29-Nov-2012 |
| Time (UTC) | 06:18 |
| Platform | Not applicable |
| File name | Ia64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.18014_none_b526ffedc4a68adb.manifest |
| File version | Not applicable |
| File size | 3,836 |
| Date (UTC) | 29-Nov-2012 |
| Time (UTC) | 06:16 |
| Platform | Not applicable |
| File name | Ia64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.22176_none_b571bdc4ddf304f9.manifest |
| File version | Not applicable |
| File size | 3,836 |
| Date (UTC) | 29-Nov-2012 |
| Time (UTC) | 06:50 |
| Platform | Not applicable |
| File name | Wow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.17939_none_bf0585c900597ecc.manifest |
| File version | Not applicable |
| File size | 1,166 |
| Date (UTC) | 22-Aug-2012 |
| Time (UTC) | 17:23 |
| Platform | Not applicable |
| File name | Wow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22176_none_bf60ba28199a7597.manifest |
| File version | Not applicable |
| File size | 1,166 |
| Date (UTC) | 29-Nov-2012 |
| Time (UTC) | 05:51 |
| Platform | Not applicable |