December 13, 2022-KB5020880 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 22H2

2022-12-1308:00:00

Microsoft

support.microsoft.com

windows 11

.net framework

security update

reliability improvement

vulnerability

known issue resolution

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

AI Score

7.9

Confidence

High

EPSS

0.002

Percentile

62.2%

JSON

December 13, 2022-KB5020880 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 22H2

Release Date:
December 13, 2022 Version: ** .NET Framework 3.5 and 4.8.1**

**Note:**Revised on Jun 20, 2023 to add resolution to known issue.

The December 13, 2022 update for Windows 11, version 22H2 includes cumulative reliability improvements in .NET Framework 3.5 and 4.8.1. 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 This security update addresses a vulnerability where restricted mode is triggered for the parsing of XPS files, preventing gadget chains which could allow remote code execution on an affected system. For more information please see CVE-2022-41089.** Quality and Reliability Improvements**There are no new Quality and Reliability Improvements in this update.

Known issues in this update

Symptom	After installing this update, WPF apps may have a change in behavior. For more information about this issue, see KB5022083
Workaround	To mitigate this issue, see KB5022083. Resolution

How to get this update

Install this updateRelease 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.
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 as follows: Product: Windows 11, version 22H2Classification: Security Updates 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 4.8.1 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.