Release Date:February 14, 2023
Version: .NET Framework 3.5 and 4.8
Note: Revised on Jun 20, 2023 to add resolution to known issue.
The February 14, 2023 update for Azure Stack HCI, version 21H2 includes cumulative reliability improvements in .NET Framework 3.5 and 4.8. We recommend that you apply this update as part of your regular maintenance routines. Before you install this update, see the Prerequisites and Restart requirement sections.
Summary
Security Improvements
CVE-2023-21808 - .NET Framework Remote Code Execution Vulnerability This security update addresses a vulnerability in the MSDIA SDK where an untrusted pointer dereference can cause memory corruption, leading to a crash or remove code execution. For more information please see CVE-2023-21808.
CVE-2023-21722 - .NET Framework Denial of Service Vulnerability This security update addresses a vulnerability where the Visual Studio WMI Setup Provider Installer can be used by a low level, local attacker to corrupt local files that SYSTEM can writ to, leading to a potential denial of service. For more information please see CVE-2023-21722.
Quality and Reliability Improvements
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WPF1 |
- Addresses an issue in propagation of ElementHost controls Visible property to underlying HwndWrapper. - Addresses an issue that restores System.Windows.Controls.VirtualizingStackPanel scrolling behavior for CollectionChange event. - Addresses an issue to ignore Win32LastError when calling GetWindowText and GetWindowTextLength methods. |
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Networking |
- Addresses an issue in the Socket.EndReceiveFrom method that may lead to AccessViolationException in rare scenarios. |
1Windows Presentation Foundation (WPF)
Additional information about this update
The following articles contain additional information about this update as it relates to individual product versions.
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5022735 Description of the Cumulative Update for .NET Framework 3.5 and 4.8 for Azure Stack HCI, version 21H2 (KB5022735)
Known issues in this update
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Symptom |
After installing this update, WPF apps may have a change in behavior. For more information about this issue, see KB5022083 |
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Workaround |
To mitigate this issue, see KB5022083. |
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Resolution |
This issue has been resolved in the June 13, 2023 Security and Quality Rollup and Cumulative Update. If you used any workaround or mitigations for this issue, they are no longer needed, and we recommend you remove them. To remove workaround review the workaround or alternative workaround which was applied for instructions. The workaround should be removed prior to installing the June update. |
How to get this update
Install this update
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Release Channel |
Available |
Next Step |
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Windows Update and Microsoft Update |
Yes |
None. This update will be downloaded and installed automatically from Windows Update. |
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Windows Update for Business |
Yes |
None. This update will be downloaded and installed automatically from Windows Update. |
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Microsoft Update Catalog |
Yes |
To get the standalone package for this update, go to the Microsoft Update Catalog website. |
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Windows Server Update Services (WSUS) |
Yes |
This individual .NET Framework product update will be installed, as applicable, by applying the operating system update. For more information about operating system updates see additional information about this update section. |
File information
For a list of the files that are provided in this update, download the file information for cumulative update.
Prerequisites
To apply this update, you must have .NET Framework 3.5 or 4.8 installed.
Restart requirement
You must restart the computer after you apply this update if any affected files are being used. We recommend that you exit all .NET Framework-based applications before you apply this update.
How to obtain help and support for this update
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Help for installing updates: Windows Update FAQ
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Protect yourself online and at home: Windows Security support
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Local support according to your country: International Support
