October 10, 2023 - KB5031358 (OS Build 22000.2538)
IMPORTANT After September 26, 2023, there will no longer be optional, non-security preview releases for Windows 11, version 21H2. Only cumulative monthly security updates will continue for the supported versions of Windows 11, version 21H2.
UPDATED 10/10/2023
REMINDER Some editions of Windows 11, version 21H2 are at end of service today, October 10, 2023. These are Home, Pro, Pro Education, and Pro for Workstation. After today, devices that run these editions will not receive monthly security and quality updates. These updates contain protections from the latest security threats.
Windows 11 version 21H2 End of Servicing on October 10, 2023
Windows 11, version 21H2 will reach end of servicing on October 10, 2023. This applies to the following editions released in October of 2021: Windows 11 Home, version 21H2 Windows 11 Pro, version 21H2 Windows 11 Pro for Workstations, version 21H2 Windows 11 Pro Education, version 21H2 These...www.elevenforum.com
We will continue to support the remaining editions of Windows 11, version 21H2.
For information about Windows update terminology, see the article about the types of Windows updates and the monthly quality update types. For an overview of Windows 11, version 21H2, see its update history page.
Note Follow @WindowsUpdate to find out when new content is published to the Windows release health dashboard.
Tip: Looking for this month's video? It's now in the Windows 11, version 22H2 article.
Highlights
- This update addresses security issues for your Windows operating system.
Improvements
This security update includes improvements that were a part of update KB5030301 (released September 26, 2023). When you install this KB:
If you installed earlier updates, only the new updates contained in this package will be downloaded and installed on your device.
- To protect against CVE-2023-44487, you should install the latest Windows update. Based on your use case, you can also set the limit of the RST_STREAMS per minute using the new registry keys in this update.
Registry key Default value Valid value range Registry key function Http2MaxClientResetsPerMinute 400 0–65535 Sets the allowed number of resets (RST_STREAMS) per minute for a connection. When you reach this limit, a GOAWAY message is sent to client for the connection. Http2MaxClientResetsGoaway 1 0-1 Disables or enables the GOAWAY message to send when you reach the limit. If you set this to 0, the connection ends as soon as you reach the limit.
For more information about security vulnerabilities, please refer to the Security Update Guide website and the October 2023 Security Updates.
Windows 11 servicing stack update - 22000.2531
This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Servicing stack updates (SSU) ensure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates.
Known issues in this update
Microsoft is not currently aware of any issues with this update.
How to get this update
Before installing this update
Microsoft combines the latest servicing stack update (SSU) for your operating system with the latest cumulative update (LCU). For general information about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions.
Install this update
Release Channel Available Next Step Windows Update and Microsoft Update Yes None. This update will be downloaded and installed automatically from Windows Update. Windows Update for Business Yes None. This update will be downloaded and installed automatically from Windows Update in accordance with configured policies. Microsoft Update Catalog Yes To get the standalone package for this update, go to the Microsoft Update Catalog website. Windows Server Update Services (WSUS) Yes This update will automatically sync with WSUS if you configure Products and Classifications as follows:
Product: Windows 11
Classification: Security Updates
If you want to remove the LCU
To remove the LCU after installing the combined SSU and LCU package, use the DISM/Remove-Package command line option with the LCU package name as the argument. You can find the package name by using this command: DISM /online /get-packages.
Running Windows Update Standalone Installer (wusa.exe) with the /uninstall switch on the combined package will not work because the combined package contains the SSU. You cannot remove the SSU from the system after installation.
File information
For a list of the files that are provided in this update, download the file information for cumulative update 5031358.
For a list of the files that are provided in the servicing stack update, download the file information for the SSU - version 22000.2531.
Source:
October 10, 2023—KB5031358 (OS Build 22000.2538) - Microsoft Support
support.microsoft.com
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UUP Dump - Download Windows Insider ISO
UUP Dump is the most practical and easy way to get ISO images of any Insider Windows 10 or Windows 11 version, as soon as Microsoft has released a new build. UUP Dump creates a download configuration file according to your choices, downloads necessary files directly from Microsoft servers, and...
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