For information about this issue in Windows 7 or Windows Server 2008 R2, see update 2887519.

Symptoms

You have a server that is running Windows Server 2012. When the server has the Subsystem for Unix Applications (SUA) installed, the Psxss.exe process may stop intermittently.

Cause

This problem occurs because of a double-free condition.

Resolution

Hotfix information

A supported hotfix is available from Microsoft Support. 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, go to 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

There are no prerequisites for installing this hotfix.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any previously released hotfix.

The English (United States) 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 notesImportant Windows 8 and Windows Server 2012 hotfixes are included in the same packages. However, only "Windows 8" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 8" 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 0.16 xxx

    Windows 8 and Windows Server 2012

    RTM

    GDR

    6.2.920 0.21 xxx

    Windows 8 and Windows Server 2012

    RTM

    LDR

  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows 8 and Windows Server 2012" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely 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

Loginenv

6.2.9200.16384

10,752

26-Jul-2012

03:20

Not Applicable

Makedev

6.2.9200.16384

32,768

26-Jul-2012

03:20

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

6.2.9200.21189

289,280

08-Aug-2014

03:03

x86

Psxdllsvr.dll

6.2.9200.21189

339,456

08-Aug-2014

03:03

x86

Psxdrv.sys

6.2.9200.16384

8,192

26-Jul-2012

02:38

x86

Psxoffset

6.2.9200.16384

13,824

26-Jul-2012

03:20

Not Applicable

Psxrun.exe

6.2.9200.16384

41,984

26-Jul-2012

03:20

x86

Psxss.exe

6.2.9200.21192

650,240

08-Aug-2014

03:04

x86

Sua-ppdlic.xrm-ms

Not Applicable

2,873

08-Aug-2014

03:50

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 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

Loginenv

6.2.9200.16384

12,288

26-Jul-2012

03:08

Not Applicable

Makedev

6.2.9200.16384

41,472

26-Jul-2012

03:08

Not Applicable

Posix.exe

6.2.9200.16384

89,088

26-Jul-2012

03:08

x64

Psxdll.dll

6.2.9200.21189

315,904

08-Aug-2014

02:56

x64

Psxdllsvr.dll

6.2.9200.21189

364,032

08-Aug-2014

02:56

x64

Psxdrv.sys

6.2.9200.16384

9,728

26-Jul-2012

02:30

x64

Psxoffset

6.2.9200.16384

15,360

26-Jul-2012

03:08

Not Applicable

Psxrun.exe

6.2.9200.16384

44,544

26-Jul-2012

03:08

x64

Psxss.exe

6.2.9200.21192

837,120

08-Aug-2014

02:57

x64

Sua-ppdlic.xrm-ms

Not Applicable

2,873

08-Aug-2014

06:33

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

6.2.9200.21189

305,152

02-Aug-2014

03:08

x86

Psxdllsvr.dll

6.2.9200.21189

354,304

02-Aug-2014

03:08

x86

Additional file information for Windows 8 and for Windows Server 2012

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

File name

Package_1_for_kb2990830~31bf3856ad364e35~x86~~6.2.2.0.mum

File version

Not Applicable

File size

1,806

Date (UTC)

08-Aug-2014

Time (UTC)

20:39

File name

Package_2_for_kb2990830~31bf3856ad364e35~x86~~6.2.2.0.mum

File version

Not Applicable

File size

2,040

Date (UTC)

08-Aug-2014

Time (UTC)

20:39

File name

Package_for_kb2990830_rtm~31bf3856ad364e35~x86~~6.2.2.0.mum

File version

Not Applicable

File size

1,945

Date (UTC)

08-Aug-2014

Time (UTC)

20:39

File name

X86_b271f32994562596976487ba555a9089_31bf3856ad364e35_6.2.9200.21192_none_cfb5bb953fcc64b1.manifest

File version

Not Applicable

File size

707

Date (UTC)

08-Aug-2014

Time (UTC)

20:39

File name

X86_subsystem-for-unix-based-applications_31bf3856ad364e35_6.2.9200.21192_none_71101377da7e0bd3.manifest

File version

Not Applicable

File size

65,697

Date (UTC)

08-Aug-2014

Time (UTC)

20:39

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

File name

Amd64_cb8c70e036aa5e72c2af8d51ea44fde4_31bf3856ad364e35_6.2.9200.21192_none_aaebc533e4346332.manifest

File version

Not Applicable

File size

1,064

Date (UTC)

08-Aug-2014

Time (UTC)

20:40

File name

Amd64_subsystem-for-unix-based-applications_31bf3856ad364e35_6.2.9200.21192_none_cd2eaefb92db7d09.manifest

File version

Not Applicable

File size

66,813

Date (UTC)

08-Aug-2014

Time (UTC)

20:40

File name

Package_1_for_kb2990830~31bf3856ad364e35~amd64~~6.2.2.0.mum

File version

Not Applicable

File size

2,043

Date (UTC)

08-Aug-2014

Time (UTC)

20:40

File name

Package_2_for_kb2990830~31bf3856ad364e35~amd64~~6.2.2.0.mum

File version

Not Applicable

File size

2,279

Date (UTC)

08-Aug-2014

Time (UTC)

20:40

File name

Package_for_kb2990830_rtm~31bf3856ad364e35~amd64~~6.2.2.0.mum

File version

Not Applicable

File size

1,957

Date (UTC)

08-Aug-2014

Time (UTC)

20:40

File name

Wow64_subsystem-for-unix-based-applications_31bf3856ad364e35_6.2.9200.21192_none_d783594dc73c3f04.manifest

File version

Not Applicable

File size

41,529

Date (UTC)

08-Aug-2014

Time (UTC)

20:40


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.

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