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KB5039867

KB5039867: Cumulative update for .NET Framework, versions 3.5 and 4.8, on Windows 10 22H2, June 2024. Windows Forms memory-leak issue addressed

In short

Addresses a Windows Forms memory-leak issue involving accessibility objects held in memory.

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

File version
2.0.50727.9176 · 4.8.4734.0
Restart
Required

What changes

Fix 1 change

Winforms

Verified in package
  • Windows Forms addresses a memory-leak issue involving accessibility objects held in memory.1
    Addresses the size of memory leaks associated with AccessibleObjects held in memory due to ref-counting.

Technical details

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

Data sheet

Released
2024-06-25
Classification
Updates
Type
Cumulative update
Restart
Required
VersionFile versionChannel
3.5 2.0.50727.9176 General availability
4.8 4.8.4734.0 General availability

Security

No vulnerabilities are listed for this update.

Updated components

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

Top changed componentsFiles
Windows Forms3

Verified in package: changed files confirm Winforms.

Sources

Updated
Cited passages from Microsoft's official notes (1)
  1. 1. Addresses an issue with the size of memory leaks associated with AccessibleObjects held in memory due to ref-counting. support.microsoft.com
Checked automatically: 8 of 8 checks passed, 1 quoted passage · compared with Microsoft's page on Nov 8, 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