February 13, 2024—KB5034766 (OS Build 22000.2777)

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.NoteFollow @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 article for Windows 11, versions 22H2 and 23H2.

Highlights

• This update addresses security issues for your Windows operating system.

Improvements

This security update includes improvements. When you install this KB:

• This update addresses an issue that affects remote direct memory access (RDMA) performance counters. They do not return networking data on VMs in the right way.
• This update addresses an issue that affects fontdrvhost.exe. It stops responding when you use Compact Font Format version 2 (CFF2) fonts.
• This update addresses a memory leak in ctfmon.exe.
• This update addresses a memory leak in TextInputHost.exe.
• This update affects Unified Extensible Firmware Interface (UEFI) Secure Boot systems. It adds a renewed signing certificate to the Secure Boot DB variable. You can now opt for this change. For more details, see KB5036210.
• This update addresses an issue that affects the download of device metadata. Downloads from the Windows Metadata and Internet Services (WMIS) over HTTPS are now more secure.
• This update addresses an issue that affects the Local Security Authority Subsystem Service (LSASS). It might stop working. This occurs when you access the Active Directory database.
• This update addresses an issue that affects Windows Defender Application Control (WDAC). Its “allow” policies might block some binaries from running.
• This update addresses an issue that affects the Certificate Authority snap-in. You cannot select the “Delta CRL” option. This stops you from using the GUI to publish Delta CRLs.
• This update changes a setting in Active Directory Users & Computers. By default, the snap-in now uses a strong certificate mapping of X509IssuerSerialNumber. It does not use the weak mapping of x509IssuerSubject.
  If you installed earlier updates, only the new updates contained in this package will be downloaded and installed on your device.For more information about security vulnerabilities, please refer to the Security Update Guide website and the February 2024 Security Updates.

Windows 11 servicing stack update - 22000.2770

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

If you want to remove the LCUTo 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 informationFor a list of the files that are provided in this update, download the file information for cumulative update 5034766. For a list of the files that are provided in the servicing stack update, download the file information for the SSU - version 22000.2770.