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.NET Framework 3.5 / 4.8.1 .NET Framework 3.5 / 4.8.1 Security update
Patch Tuesday

KB5044029

KB5044029: Cumulative update for .NET Framework, versions 3.5 and 4.8.1, on Windows 10 21H2/22H2, October 2024. Runtime denial-of-service flaws and app targeting issue addressed

In short

The update addresses two .NET Framework denial-of-service vulnerabilities and reliability issues affecting SQL CLR scenarios and applications targeting .NET Framework.

Does it affect you? Applies to: Devices running Windows 10, version 21H2 or 22H2, with .NET Framework 3.5 or 4.8.1 installed. The package information also lists Windows 10 Enterprise LTSC 2021.

File version
2.0.50727.9179 · 4.8.9277.0
Security
2 fixed
Restart
Required
Review notes Additional details from the official release notes (2) Read notes
  • What changes The update is for Windows 10 version 21H2 and 22H2 systems with .NET Framework 3.5 or 4.8.1 installed. The SQL CLR scenario describes affected software, not a separate reader audience.
  • What changes The update is for Windows 10 version 21H2 and 22H2 systems with .NET Framework 3.5 or 4.8.1 installed. The application-targeting issue describes affected software, not a separate reader audience.

The official sources are linked at the end of the page.

What changes

Fixes 2 changes

.NET Libraries

For: Apps using SQL CLR

  • Addresses runtime exceptions in certain SQL CLR-hosted scenarios following May cumulative updates.1

.NET Fundamentals

For: Applications targeting .NET Framework

  • Addresses an issue that prevented applications from targeting .NET Framework.2

Technical details

Data sheet · Security · Downloads · Components Click to collapse or expand

Data sheet

Released
2024-10-08
Classification
Security Updates
Type
Cumulative update
Restart
Required
Replaces
KB5042097, KB5039893
Replaced by
KB5049621
VersionFile versionChannel
3.5 2.0.50727.9179 General availability
4.8.1 4.8.9277.0 General availability

Security

2 vulnerabilities fixed
2 not rated
VulnerabilitySeverityCVSS
CVE-2024-43483
.NET, .NET Framework, and Visual Studio Denial of Service Vulnerability
 Not rated —
CVE-2024-43484
.NET, .NET Framework, and Visual Studio Denial of Service Vulnerability
 Not rated —

Downloads (Microsoft Update Catalog)

x64 Windows 10 Enterprise LTSC 2021 / Windows 10, version 22H2
75.1 MB
windows10.0-kb5044029-x64-ndp481.msu Main update · KB5044029 SHA-1: 7636169b…a3fa31
x86 Windows 10 Enterprise LTSC 2021 / Windows 10, version 22H2
46.7 MB
windows10.0-kb5044029-x86-ndp481.msu Main update · KB5044029 SHA-1: 8901ca4b…240774

Updated components

115 files changed since the previous update for the same versions.

Top changed componentsFiles
WPF42
.NET runtime (CLR)18
ASP.NET15

Sources

Updated
Cited passages from Microsoft's official notes (2)
  1. 1. Addresses an issue with May cumulative updates causing customers to observe runtime exceptions in certain SQL CLR hosted scenarios. support.microsoft.com
  2. 2. Addresses an issue where applications cannot target .NET Framework. support.microsoft.com
Checked automatically: 7 of 8 checks passed, 2 quoted passages · compared with Microsoft's page on Oct 20, 2026
  • Quotes found in the official pages: passed
  • Numbers found in the sources: passed
  • Vulnerabilities from the dossier only: passed
  • Links to allowed domains only: passed
  • Every official change covered: passed
  • Readable plain text: passed
  • Changes confirmed by the file list: passed
  • Sources agree: not passed

A second AI read the text against the sources: correctness 4/5, clarity 3/5, completeness 5/5. How we work

Published by The Update Bureau. Written with AI from Microsoft's own documents, checked by rules and a second AI. How we work · Report a mistake