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

KB5044030

KB5044030: Cumulative update for .NET Framework, versions 3.5 and 4.8.1, on Windows 11 24H2 and Windows Server 2025, October 2024. Denial-of-service flaws and SQL CLR runtime exceptions addressed

In short

Addresses two .NET Framework denial-of-service vulnerabilities and issues that could cause SQL CLR runtime exceptions or prevent applications from targeting .NET Framework.

Does it affect you? Applies to: Devices running Windows 11, version 24H2, or Windows Server 2025 with .NET Framework 3.5 or 4.8.1 installed.

File version
2.0.50727.9179 · 4.8.9277.0
Security
2 fixed
Restart
Required

What changes

Fixes 4 changes

.NET Framework

2 items

For: Devices with .NET Framework 3.5 or 4.8.1

  • Addresses a denial-of-service vulnerability in .NET Framework.1
    CVE-2024-43483.
  • Addresses a denial-of-service vulnerability in .NET Framework.2
    CVE-2024-43484.

.NET Libraries

  • Addresses an issue that caused runtime errors in certain applications using SQL CLR.3
    Addresses runtime exceptions in certain SQL CLR hosted scenarios caused by May cumulative updates.

.NET Fundamentals

For: Application developers

  • Addresses an issue that prevented applications from targeting .NET Framework.4

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
Replaced by
KB5049622
VersionFile versionChannel
3.5 2.0.50727.9179 General availability
4.8.1 4.8.9277.0 General availability

Security

2 vulnerabilities fixed
2 important
VulnerabilitySeverityCVSS
CVE-2024-43483
.NET, .NET Framework, and Visual Studio Denial of Service Vulnerability
 Important 7.5
CVE-2024-43484
.NET, .NET Framework, and Visual Studio Denial of Service Vulnerability
 Important 7.5

Downloads (Microsoft Update Catalog)

x64 Windows 11, version 24H2 / Windows Server 2025
71.0 MB
windows11.0-kb5044030-x64-ndp481.msu Main update · KB5044030 SHA-1: b691d967…2164f3
Arm64 Windows 11, version 24H2 / Windows Server 2025
87.4 MB
windows11.0-kb5044030-arm64-ndp481.msu Main update · KB5044030 SHA-1: 8591ea6b…f91391

Sources

Updated
Cited passages from Microsoft's official notes (4)
  1. 1. This security update addresses a denial-of-service vulnerability detailed in n CVE-2024-43483 . support.microsoft.com
  2. 2. This security update addresses a denial-of-service vulnerability detailed in n CVE-2024-43484 . support.microsoft.com
  3. 3. Addresses an issue with May cumulative updates causing customers to observe runtime exceptions in certain SQL CLR hosted scenarios. support.microsoft.com
  4. 4. Addresses an issue where applications cannot target .NET Framework. support.microsoft.com
Checked automatically: 7 of 8 checks passed, 4 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 5/5, clarity 4/5, 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