Microsoft releases KB5018427 update to address security issues with Windows 11 2022 Update

Microsoft has released its first update to Windows 11 22H2 / Windows 11 2022 Update in the form of KB5018427. This is a cumulative security update that includes the improvements from the previously released KB5017389 update, as well as additional "security issues".

While the update addresses quite a large number of problems with Windows 11 22H2, it does not fix the known issues with provisioning packages or slow file copying.

See also:

• Microsoft confirms worrying slow file copying problem in Windows 11 2022 Update
• Microsoft updates its mitigation advice for Exchange Server zero-day vulnerabilities
• Microsoft warns of problems with provisioning packages in Windows 11 2022 Update

As is common with security-related updates, information about precisely what has been fixed is not very detailed. Microsoft says variously: "we address security issues for your Windows operating system", and "this update contains miscellaneous security improvements to internal OS functionality. No additional issues were documented for this release".  

Microsoft shares the following list of improvements included with this update:

• Addresses an issue that affects some apps that were not signed by the Microsoft Store. You must reinstall them after you upgrade the OS.
• Addresses issues that cause updates to the Microsoft Store to fail.
• Addresses an issue that stops you from signing in to various Microsoft Office 365 apps. This affects Outlook, Word, Teams, and so on
• Updates the start date for daylight saving time in Chile. It will start on September 11, 2022 instead of on September 4, 2022.
• Addresses an issue that affects the Windows Search service. It causes the indexing progress for the service to be slow.
• Addresses an issue that affects some processors. This issue occurs when you turn on Hyper-V and kernel Direct Memory Access (DMA) protections.
• Addresses an issue that affects a network’s static IP. The issue causes the configuration of the static IP to be inconsistent. Because of this, NetworkAdapterConfiguration() fails sporadically.
• Addresses an issue that affects Task Manager. It stops working when you switch between light and dark mode or change the accent color.
• Addresses an issue that affects the font of three Chinese characters. When you format these characters as bold, the width size is wrong.
• Addresses an issue that affects graphics drivers that use d3d9on12.dll.
• Reduces the power that the Dynamic Host Configuration Protocol uses on some devices when they are in Sleep mode.
• Addresses an issue that affects URLs generated by JavaScript: URLs. These URLs do not work as expected when you add them to the Favorites menu in IE mode when you use Microsoft Edge.
• Addresses an issue that forces the IE mode tabs in a session to reload when you use Microsoft Edge.
• Addresses an issue that affects window.open in IE mode when you use Microsoft Edge.
• Addresses an issue that successfully opens a Microsoft Edge browser window in IE mode to display a PDF file. Later, browsing to another IE mode site within the same window fails.
• Addresses an issue that affects the Microsoft Japanese input method editor (IME). Text reconversion fails when you use some third-party virtual desktops.
• Addresses an issue that might cause an application to stop responding. This might occur when the input queue overflows.
• Addresses an issue that affects XML Paper Specification (XPS) viewers. This might stop you from opening XPS files in some non-English languages. These include some Japanese and Chinese character encodings. This issue affects XPS and Open XPS (OXPS) files.
• Addresses an issue that creates a duplicate print queue. Because of this, the original print queue stops working.
• Addresses an issue that might bypass MSHTML and ActiveX rules for Windows Defender Application Control (WDAC).
• Addresses an issue that affects the Miracast UI. Sometimes it closes too soon when you cast to devices that use the DeviceObjectType:Aep.
• Adds more dynamic Widgets content to your taskbar with notification badging. If you open the Widgets board while a badge displays on the taskbar, a banner appears at the top of the board. It provides more information about what triggered the notification badge.
• Addresses an issue that affects the SharedPC account manager. The issue stops it from deleting many accounts during cleanup.
• Addresses an issue that causes LogonUI.exe to stop working. Because of this, you cannot dismiss the lock screen to view the credentials screen.
• Addresses an issue that affects Dual SIM calling. If you select no SIM on your phone and initiate a call on your device, Dual SIM functionality does not work.
• Addresses an issue that affects the FindNextFileNameW() function. It might leak memory.
• Addresses an issue that affects robocopy. Robocopy fails to set a file to the right modified time when using the /IS option.
• Addresses an issue that affects cldflt.sys. A stop error occurs when it is used with Microsoft OneDrive.
• Addresses an issue that affects Roaming User Profiles. After you sign in or sign out, some of your settings are not restored.
• Addresses an issue that affects the LanmanWorkstation service. It leaks memory when you mount a network drive.

You can download KB5018427 update by checking Windows Update, or by using the Microsoft Update Catalog.