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.NET Framework 3.5 / 4.8 .NET Framework 3.5 / 4.8 Security update
Patch Tuesday

KB5044020

KB5044020: Cumulative update for .NET Framework, versions 3.5 and 4.8, on Windows 10 21H2/22H2, October 2024. Two .NET denial-of-service flaws and SQL CLR exceptions addressed

In short

Addresses two .NET Framework denial-of-service vulnerabilities and runtime exceptions in certain SQL CLR hosted scenarios.

Does it affect you? Applies to: Devices running Windows 10 version 21H2 or 22H2, including Windows 10 Enterprise LTSC 2021, with .NET Framework 3.5 or 4.8 installed.

File version
2.0.50727.9179 · 4.8.4762.0
Security
2 fixed
Restart
Required

What changes

Fixes 3 changes

.NET Framework

2 items

For: .NET Framework users

  • 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

For: Applications using SQL CLR

  • Addresses runtime exceptions in certain SQL CLR hosted scenarios after May cumulative updates.3

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
KB5042056, KB5039884
Replaced by
KB5049613
VersionFile versionChannel
3.5 2.0.50727.9179 General availability
4.8 4.8.4762.0 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
76.1 MB
windows10.0-kb5044020-x64-ndp48.msu Main update · KB5044020 SHA-1: 01927b68…99f983
Arm64 Windows 10 Enterprise LTSC 2021 / Windows 10, version 22H2
47.6 MB
windows10.0-kb5044020-arm64-ndp48.msu Main update · KB5044020 SHA-1: b0459ae7…5dd213
x86 Windows 10 Enterprise LTSC 2021 / Windows 10, version 22H2
47.6 MB
windows10.0-kb5044020-x86-ndp48.msu Main update · KB5044020 SHA-1: 0573220b…f32fa5

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 (3)
  1. 1. CVE-2024-43483 - .NET Framework Denial of service vulnerability This security update addresses a denial-of-service vulnerability support.microsoft.com
  2. 2. CVE-2024-43484 - .NET Framework Denial of service vulnerability This security update addresses a denial-of-service vulnerability 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
Checked automatically: 7 of 8 checks passed, 3 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