Symptoms

Assume that a computer is running a Telnet service of Subsystem for UNIX-based Applications in Windows 8, Windows Server 2012, Windows 7, or Windows Server 2008 R2. You establish a Telnet session on a client, and then close the Telnet session without closing the other processes that were spawned in the same Telnet session. When you try to create a new Telnet session, the Psxss.exe process crashes.

Cause

This issue occurs because a property of the Psxss.exe process is not updated when the Telnet session is closed. Therefore, when a new session is created, the property is invalid, and it causes the crash.

Resolution

To resolve this issue, we have released a hotfix for Windows 8, Windows Server 2012, Windows 7, or Windows Server 2008 R2.
Before you apply the hotfix, check out the "Prerequisites" section in this article.

Hotfix information

Important Do not install a language pack after you install this hotfix. If you do, the language-specific changes in the hotfix will not be applied, and you will have to reinstall the hotfix. For more information, see Add language packs to Windows.

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.

Hotfix detail information

Prerequisites

To apply this hotfix, you must install Service Pack 1 for Windows 7 or Windows Server 2008 R2. And there is no prerequisite for Windows 8 and Windows Server 2012.

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 and Windows Server 2012 file information and notes

Important Windows 8 hotfixes and Windows Server 2012 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/Windows Server 2012" 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

    6.2.920 0.16xxx

    Windows 8 and Windows Server 2012

    RTM

    GDR

    6.2.920 0.21xxx

    Windows 8 and Windows Server 2012

    RTM

    LDR

  • 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 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

File name

File version

File size

Date

Time

Platform

Baseu.dnl

Not applicable

166

02-Jun-2012

14:54

Not applicable

Baseu.prm

Not applicable

1,153

02-Jun-2012

14:54

Not applicable

Desktop.ini

Not applicable

81

02-Jun-2012

14:54

Not applicable

Disablesetuid.ini

Not applicable

92

02-Jun-2012

14:54

Not applicable

Download utilities for subsystem for unix-based applications.lnk

Not applicable

412

25-Jul-2012

20:37

Not applicable

Download.url

Not applicable

71

02-Jun-2012

14:54

Not applicable

Enablesetuid.ini

Not applicable

92

02-Jun-2012

14:54

Not applicable

Posix.exe

6.2.9200.16384

82,944

26-Jul-2012

03:20

x86

Posixsscom.dll

6.2.9200.16384

6,656

26-Jul-2012

03:19

x86

Psxdll.dll

6.2.9200.21435

289,280

02-Apr-2015

00:40

x86

Psxdllsvr.dll

6.2.9200.21435

339,456

02-Apr-2015

00:40

x86

Psxdrv.sys

6.2.9200.16384

8,192

26-Jul-2012

02:38

x86

Psxrun.exe

6.2.9200.16384

41,984

26-Jul-2012

03:20

x86

Psxss.exe

6.2.9200.21439

650,240

02-Apr-2015

00:40

x86

Sua-ppdlic.xrm-ms

Not applicable

2,873

02-Apr-2015

01:14

Not applicable

Suares.dll

6.2.9200.16384

2,048

26-Jul-2012

02:45

x86

What's new in subsystem for unix-based applications.lnk

Not applicable

1,256

25-Jul-2012

20:37

Not applicable

For all supported x64-based versions of Windows 8 and of Windows Server 2012

File name

File version

File size

Date

Time

Platform

Baseu.dnl

Not applicable

166

02-Jun-2012

14:54

Not applicable

Baseu.prm

Not applicable

1,153

02-Jun-2012

14:54

Not applicable

Desktop.ini

Not applicable

81

02-Jun-2012

14:54

Not applicable

Disablesetuid.ini

Not applicable

92

02-Jun-2012

14:54

Not applicable

Download utilities for subsystem for unix-based applications.lnk

Not applicable

412

25-Jul-2012

20:33

Not applicable

Download.url

Not applicable

71

02-Jun-2012

14:54

Not applicable

Enablesetuid.ini

Not applicable

92

02-Jun-2012

14:54

Not applicable

Posix.exe

6.2.9200.16384

89,088

26-Jul-2012

03:08

x64

Psxdll.dll

6.2.9200.21435

315,904

02-Apr-2015

00:38

x64

Psxdllsvr.dll

6.2.9200.21435

364,032

02-Apr-2015

00:38

x64

Psxdrv.sys

6.2.9200.16384

9,728

26-Jul-2012

02:30

x64

Psxrun.exe

6.2.9200.16384

44,544

26-Jul-2012

03:08

x64

Psxss.exe

6.2.9200.21439

837,120

02-Apr-2015

00:39

x64

Sua-ppdlic.xrm-ms

Not applicable

2,873

02-Apr-2015

03:41

Not applicable

Suares.dll

6.2.9200.16384

2,048

26-Jul-2012

02:35

x64

What's new in subsystem for unix-based applications.lnk

Not applicable

1,256

25-Jul-2012

20:33

Not applicable

Posixsscom.dll

6.2.9200.16384

6,656

26-Jul-2012

03:19

x86

Psxdll.dll

6.2.9200.21435

305,152

30-Mar-2015

04:53

x86

Psxdllsvr.dll

6.2.9200.21435

354,304

30-Mar-2015

04:53

x86

Windows 7 and Windows Server 2008 R2 file information and notes

Important Windows 7 hotfixes and Windows Server 2008 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 7/Windows Server 2008 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

    6.1.760 1.23xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    LDR

  • 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 7

File name

File version

File size

Date

Time

Platform

Baseu.dnl

Not applicable

166

09-Jul-2013

06:48

Not applicable

Baseu.prm

Not applicable

1,153

09-Jul-2013

06:48

Not applicable

Desktop.ini

Not applicable

81

09-Jul-2013

06:48

Not applicable

Disablesetuid.ini

Not applicable

92

09-Jul-2013

06:48

Not applicable

Download.url

Not applicable

71

09-Jul-2013

06:48

Not applicable

Enablesetuid.ini

Not applicable

92

09-Jul-2013

06:48

Not applicable

Posix.exe

6.1.7601.23015

80,896

02-Apr-2015

05:15

x86

Posixsscom.dll

6.1.7601.23015

5,632

02-Apr-2015

05:16

x86

Psxdll.dll

6.1.7601.23015

309,248

02-Apr-2015

05:16

x86

Psxdllsvr.dll

6.1.7601.23015

357,888

02-Apr-2015

05:16

x86

Psxdrv.sys

6.1.7601.23015

9,216

02-Apr-2015

04:07

x86

Psxrun.exe

6.1.7601.23015

40,960

02-Apr-2015

05:15

x86

Psxss.exe

6.1.7601.23015

657,920

02-Apr-2015

05:15

x86

Sua-ppdlic.xrm-ms

Not applicable

2,981

02-Apr-2015

05:33

Not applicable

Suares.dll

6.1.7601.23015

2,048

02-Apr-2015

05:13

x86

For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Baseu.dnl

Not applicable

166

09-Jul-2013

06:48

Not applicable

Baseu.prm

Not applicable

1,153

09-Jul-2013

06:48

Not applicable

Disablesetuid.ini

Not applicable

92

09-Jul-2013

06:48

Not applicable

Download.url

Not applicable

71

09-Jul-2013

06:48

Not applicable

Enablesetuid.ini

Not applicable

92

09-Jul-2013

06:48

Not applicable

Posix.exe

6.1.7601.23015

89,088

02-Apr-2015

05:26

x64

Psxdll.dll

6.1.7601.23015

330,240

02-Apr-2015

05:27

x64

Psxdllsvr.dll

6.1.7601.23015

378,368

02-Apr-2015

05:27

x64

Psxdrv.sys

6.1.7601.23015

10,240

02-Apr-2015

04:13

x64

Psxrun.exe

6.1.7601.23015

44,032

02-Apr-2015

05:26

x64

Psxss.exe

6.1.7601.23015

850,432

02-Apr-2015

05:26

x64

Suacore-ppdlic.xrm-ms

Not applicable

2,993

02-Apr-2015

05:54

Not applicable

Suares.dll

6.1.7601.23015

2,048

02-Apr-2015

05:24

x64

Baseu.dnl

Not applicable

166

09-Jul-2013

06:48

Not applicable

Baseu.prm

Not applicable

1,153

09-Jul-2013

06:48

Not applicable

Desktop.ini

Not applicable

81

09-Jul-2013

06:48

Not applicable

Disablesetuid.ini

Not applicable

92

09-Jul-2013

06:48

Not applicable

Download.url

Not applicable

71

09-Jul-2013

06:48

Not applicable

Enablesetuid.ini

Not applicable

92

09-Jul-2013

06:48

Not applicable

Posix.exe

6.1.7601.23015

89,088

02-Apr-2015

05:26

x64

Psxdll.dll

6.1.7601.23015

330,240

02-Apr-2015

05:27

x64

Psxdllsvr.dll

6.1.7601.23015

378,368

02-Apr-2015

05:27

x64

Psxdrv.sys

6.1.7601.23015

10,240

02-Apr-2015

04:13

x64

Psxrun.exe

6.1.7601.23015

44,032

02-Apr-2015

05:26

x64

Psxss.exe

6.1.7601.23015

850,432

02-Apr-2015

05:26

x64

Sua-ppdlic.xrm-ms

Not applicable

2,981

02-Apr-2015

05:54

Not applicable

Suares.dll

6.1.7601.23015

2,048

02-Apr-2015

05:24

x64

Posixsscom.dll

6.1.7601.23015

5,632

02-Apr-2015

05:16

x86

Psxdll.dll

6.1.7601.23015

328,192

02-Apr-2015

05:16

x86

Psxdllsvr.dll

6.1.7601.23015

376,832

02-Apr-2015

05:16

x86

Posixsscom.dll

6.1.7601.23015

5,632

02-Apr-2015

05:16

x86

Psxdll.dll

6.1.7601.23015

328,192

02-Apr-2015

05:16

x86

Psxdllsvr.dll

6.1.7601.23015

376,832

02-Apr-2015

05:16

x86

For all supported IA-64-based versions of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Baseu.dnl

Not applicable

166

09-Jul-2013

06:48

Not applicable

Baseu.prm

Not applicable

1,153

09-Jul-2013

06:48

Not applicable

Desktop.ini

Not applicable

81

09-Jul-2013

06:48

Not applicable

Disablesetuid.ini

Not applicable

92

09-Jul-2013

06:48

Not applicable

Download.url

Not applicable

71

09-Jul-2013

06:48

Not applicable

Enablesetuid.ini

Not applicable

92

09-Jul-2013

06:48

Not applicable

Posix.exe

6.1.7601.23015

181,248

02-Apr-2015

04:27

IA-64

Psxdll.dll

6.1.7601.23015

718,848

02-Apr-2015

04:28

IA-64

Psxdllsvr.dll

6.1.7601.23015

744,448

02-Apr-2015

04:28

IA-64

Psxdrv.sys

6.1.7601.23015

23,552

02-Apr-2015

03:37

IA-64

Psxrun.exe

6.1.7601.23015

79,360

02-Apr-2015

04:27

IA-64

Psxss.exe

6.1.7601.23015

1,650,176

02-Apr-2015

04:27

IA-64

Sua-ppdlic.xrm-ms

Not applicable

2,981

02-Apr-2015

04:42

Not applicable

Suares.dll

6.1.7601.23015

2,048

02-Apr-2015

04:25

IA-64

Posixsscom.dll

6.1.7601.23015

5,632

02-Apr-2015

05:16

x86

Psxdll.dll

6.1.7601.23015

328,192

02-Apr-2015

05:16

x86

Psxdllsvr.dll

6.1.7601.23015

376,832

02-Apr-2015

05:16

x86

Additional file information

Additional file information for Windows 8 and for Windows Server 2012

Additional files for all supported x86-based versions of Windows 8

File property

Value

File name

X86_43dcf53b7d3fd87cd9459647ef8a92c1_31bf3856ad364e35_6.2.9200.21439_none_fd20da4ee944c9ac.manifest

File version

Not applicable

File size

707

Date (UTC)

02-Apr-2015

Time (UTC)

09:47

File name

X86_subsystem-for-unix-based-applications_31bf3856ad364e35_6.2.9200.21439_none_7157fab7da470d03.manifest

File version

Not applicable

File size

65,385

Date (UTC)

02-Apr-2015

Time (UTC)

09:50

Additional files for all supported x64-based versions of Windows 8 and of Windows Server 2012

File property

Value

File name

Amd64_5fbd6d1a799a80cdc68ff7f8fa3e90cb_31bf3856ad364e35_6.2.9200.21439_none_9bf15b9c6d72d7f8.manifest

File version

Not applicable

File size

1,064

Date (UTC)

02-Apr-2015

Time (UTC)

09:47

File name

Amd64_subsystem-for-unix-based-applications_31bf3856ad364e35_6.2.9200.21439_none_cd76963b92a47e39.manifest

File version

Not applicable

File size

66,405

Date (UTC)

02-Apr-2015

Time (UTC)

09:47

File name

Wow64_subsystem-for-unix-based-applications_31bf3856ad364e35_6.2.9200.21439_none_d7cb408dc7054034.manifest

File version

Not applicable

File size

41,529

Date (UTC)

02-Apr-2015

Time (UTC)

09:47

Additional file information for Windows 7 and for Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7

File property

Value

File name

X86_1578bddc0bcfe600666c5693122a26d5_31bf3856ad364e35_6.1.7601.23015_none_4bf0a3c962ac4a12.manifest

File version

Not applicable

File size

707

Date (UTC)

02-Apr-2015

Time (UTC)

16:55

File name

X86_subsystem-for-unix-based-applications_31bf3856ad364e35_6.1.7601.23015_none_767a25d2674eb25d.manifest

File version

Not applicable

File size

61,497

Date (UTC)

02-Apr-2015

Time (UTC)

05:39

Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File property

Value

File name

Amd64_681a62a98fb57d77028f98965157ee18_31bf3856ad364e35_6.1.7601.23015_none_df2e1768179a9208.manifest

File version

Not applicable

File size

1,064

Date (UTC)

02-Apr-2015

Time (UTC)

16:55

File name

Amd64_999c5376ce00dda44a06742f7608857f_31bf3856ad364e35_6.1.7601.23015_none_a535f352be8937f4.manifest

File version

Not applicable

File size

716

Date (UTC)

02-Apr-2015

Time (UTC)

16:55

File name

Amd64_eac1f5cdf1eda6cddf35823a97954b5f_31bf3856ad364e35_6.1.7601.23015_none_9d5e005d125524d8.manifest

File version

Not applicable

File size

716

Date (UTC)

02-Apr-2015

Time (UTC)

16:55

File name

Amd64_subsystem-for-unix-..d-applications-core_31bf3856ad364e35_6.1.7601.23015_none_530de363d0286731.manifest

File version

Not applicable

File size

57,114

Date (UTC)

02-Apr-2015

Time (UTC)

06:00

File name

Amd64_subsystem-for-unix-based-applications_31bf3856ad364e35_6.1.7601.23015_none_d298c1561fac2393.manifest

File version

Not applicable

File size

62,509

Date (UTC)

02-Apr-2015

Time (UTC)

06:00

File name

Wow64_subsystem-for-unix-..d-applications-core_31bf3856ad364e35_6.1.7601.23015_none_5d628db60489292c.manifest

File version

Not applicable

File size

41,365

Date (UTC)

02-Apr-2015

Time (UTC)

05:33

File name

Wow64_subsystem-for-unix-based-applications_31bf3856ad364e35_6.1.7601.23015_none_dced6ba8540ce58e.manifest

File version

Not applicable

File size

41,411

Date (UTC)

02-Apr-2015

Time (UTC)

05:34

Additional files for all supported IA-64-based versions of Windows Server 2008 R2

File property

Value

File name

Ia64_b51b3aff624e9f021884e2f00d3d6850_31bf3856ad364e35_6.1.7601.23015_none_b47f95c268e801db.manifest

File version

Not applicable

File size

1,062

Date (UTC)

02-Apr-2015

Time (UTC)

16:54

File name

Ia64_subsystem-for-unix-based-applications_31bf3856ad364e35_6.1.7601.23015_none_767bc9c8674cbb59.manifest

File version

Not applicable

File size

62,506

Date (UTC)

02-Apr-2015

Time (UTC)

05:36

File name

Wow64_subsystem-for-unix-based-applications_31bf3856ad364e35_6.1.7601.23015_none_dced6ba8540ce58e.manifest

File version

Not applicable

File size

41,411

Date (UTC)

02-Apr-2015

Time (UTC)

05:34

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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