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.NET Framework 3.5 / 4.8.1 .NET Framework 3.5 / 4.8.1 Optional preview
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KB5048162

KB5048162: Cumulative update for .NET Framework, versions 3.5 and 4.8.1, on Windows 11 24H2, November 2024. .NET runtime crash conditions addressed

In short

Addresses .NET runtime crashes linked to certain assembly and Windows code-integrity interactions. Restart the computer after installation if affected files are in use.

Does it affect you? Applies to: Devices running Windows 11, version 24H2, with .NET Framework 3.5 or 4.8.1 installed. Packages are available for x64 and Arm64.

File version
2.0.50727.9179 · 4.8.9290.0
Restart
Required

What changes

Fix 1 change

.NET Runtime

For: devices running .NET Framework applications

  • Some .NET applications might crash during certain interactions between assemblies and Windows code-integrity updates; this update addresses those crashes.1
    Addresses crashes related to multi-module assembly native image usage and OS code integrity enforcement policy updates.

Technical details

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

Data sheet

Released
2024-11-21
Classification
Updates
Type
Cumulative update
Restart
Required
Replaces
KB5045934
Replaced by
KB5049622
VersionFile versionChannel
3.5 2.0.50727.9179 General availability
4.8.1 4.8.9290.0 General availability

Security

No vulnerabilities are listed for this update.

Updated components

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

Top changed componentsFiles
.NET runtime (CLR)12
Windows Forms2

Sources

Updated
Cited passages from Microsoft's official notes (1)
  1. 1. Address crashes that can occur due to certain interactions between multi-module assembly native image usage and OS code integrity enforcement policy updates. support.microsoft.com
Checked automatically: 8 of 8 checks passed, 1 quoted passage · 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: 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