Symptoms

When this issue occurs in Windows 8.1, Windows RT 8.1, or Windows Server 2012 R2, you cannot access the server share indefinitely with a disconnected status. The only way to recover is to restart the computer.

Cause

This issue occurs because of a race condition when a session expired status is returned for a Server Message Block (SMB) request that is followed by a disconnected connection. It causes the internal state of SMB client to be updated incorrectly.

Resolution

To resolve this issue, we have released a hotfix that has prerequisites.

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.

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, submit a request to 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:

http://support.microsoft.com/contactus/?ws=supportNote 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 update, you must have update 2919355 installed in Windows 8.1 or Windows Server 2012 R2.

Registry information

To use the hotfix in this package, you do not have to make any changes to the registry.

Restart requirement

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

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

Windows 8.1 and Windows Server 2012 R2 file information and notes

Important Windows 8.1 hotfixes and Windows Server 2012 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 8.1/Windows Server 2012 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.

  • 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 0.17 xxx

    Windows 8.1, Windows RT 8.1, and Windows Server 2012 R2

    RTM

    GDR

  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately 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.

For all supported x86-based versions of Windows 8.1

File name

File version

File size

Date

Time

Platform

Mrxsmb20.sys

6.3.9600.17658

154,112

12-Jan-2015

23:25

x86

Mrxsmb.sys

6.3.9600.17658

328,704

12-Jan-2015

23:19

x86

For all supported x64-based versions of Windows 8.1 and of Windows Server 2012 R2

File name

File version

File size

Date

Time

Platform

Mrxsmb20.sys

6.3.9600.17658

202,240

12-Jan-2015

23:25

x64

Mrxsmb.sys

6.3.9600.17658

401,408

12-Jan-2015

23:18

x64

For all supported Windows 8.1

File name

File version

File size

Date

Time

Platform

Mrxsmb20.sys

6.3.9600.17658

148,480

12-Jan-2015

23:27

Not applicable

Mrxsmb.sys

6.3.9600.17658

317,952

12-Jan-2015

23:17

Not applicable

Additional file information

Additional file information for Windows 8.1 and for Windows Server 2012 R2

Additional files for all supported x86-based versions of Windows 8.1

File property

Value

File name

X86_00b267100c501bcf0117ef1a60a9ac16_31bf3856ad364e35_6.3.9600.17658_none_18ec1d0072364a9d.manifest

File version

Not applicable

File size

1,043

Date (UTC)

13-Jan-2015

Time (UTC)

04:14

File name

X86_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.3.9600.17658_none_1f9f19f8a54398d3.manifest

File version

Not applicable

File size

4,096

Date (UTC)

13-Jan-2015

Time (UTC)

00:18

File name

X86_microsoft-windows-smbminirdr_31bf3856ad364e35_6.3.9600.17658_none_145591926c9b2700.manifest

File version

Not applicable

File size

95,877

Date (UTC)

13-Jan-2015

Time (UTC)

00:18

Additional files for all supported x64-based versions of Windows 8.1 and of Windows Server 2012 R2

File property

Value

File name

Amd64_2448b4fa2d125763cbdb2e2bd1b7b1fc_31bf3856ad364e35_6.3.9600.17658_none_453f4600eda89a69.manifest

File version

Not applicable

File size

1,049

Date (UTC)

13-Jan-2015

Time (UTC)

04:14

File name

Amd64_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.3.9600.17658_none_7bbdb57c5da10a09.manifest

File version

Not applicable

File size

4,100

Date (UTC)

13-Jan-2015

Time (UTC)

00:59

File name

Amd64_microsoft-windows-smbminirdr_31bf3856ad364e35_6.3.9600.17658_none_70742d1624f89836.manifest

File version

Not applicable

File size

95,881

Date (UTC)

13-Jan-2015

Time (UTC)

00:58

Additional files for all supported Windows 8.1

File property

Value

File name

Arm_fc7351c076e40e0d71e2adb5d751f307_31bf3856ad364e35_6.3.9600.17658_none_472ec73ad542ade5.manifest

File version

Not applicable

File size

1,043

Date (UTC)

13-Jan-2015

Time (UTC)

04:14

File name

Arm_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.3.9600.17658_none_1fa18c50a540b799.manifest

File version

Not applicable

File size

4,096

Date (UTC)

12-Jan-2015

Time (UTC)

23:54

File name

Arm_microsoft-windows-smbminirdr_31bf3856ad364e35_6.3.9600.17658_none_145803ea6c9845c6.manifest

File version

Not applicable

File size

95,877

Date (UTC)

12-Jan-2015

Time (UTC)

23:54


Status

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

References

See the terminology that Microsoft uses to describe software updates.

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