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SQL Server 2019 CU32 SQL Server 2019 CU32 Cumulative update

KB5054833

KB5054833: Cumulative update for SQL Server 2019, CU branch, February 2025. Read-scale availability groups stay in place after patching

In short

Patching a read-scale availability group no longer removes it from the patched replica. An open issue can still make some queries return incorrect results or create diagnostic files.

Does it affect you? Applies to: SQL Server 2019 instances. The update applies to all supported languages; packages and update instructions are provided for Windows and Linux.

Build
15.0.4430.1
Servicing branch
CU
Restart
Required
Review notes Additional details from the official release notes (3) Read notes
  • In short Queries using SESSION_CONTEXT may return incorrect results or trigger access violation (AV) dump files when run in parallel query plans.
  • Known issues Queries using SESSION_CONTEXT may return incorrect results or trigger access violation (AV) dump files when run in parallel query plans.
  • What to do If SQL Server 2019 CU31 is installed and the read-scale availability group issue occurs, recreate the availability group after installing CU32.

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

For servers on the CU branch: they install cumulative updates, which also bring fixes beyond security. Servers on the GDR branch (security fixes only) get a separate update. Which branch am I on?

What changes

Fix 1 change

High Availability and Disaster Recovery

  • Patching a read-scale availability group no longer removes it from the patched replica.1
    Fixes bug 3907024. If SQL Server 2019 CU31 is already installed and the issue occurred, re-create the availability group after installing this update.

Known issues

  1. Open Affects: Everyone

    Incorrect behavior of SESSION_CONTEXT in parallel plans

    Some database queries that use a saved session value might return incorrect results or create diagnostic files when SQL Server runs them in parallel, particularly after a session is reset and reused.2

    Workaround status No workaround yet

    Microsoft has not published a manual workaround for this issue yet. Monitor release health until a resolving update is available.

Technical details

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

Data sheet

Released
2025-02-27
Classification
Updates
Type
Cumulative update
Servicing branch
CU
Restart
Required
Replaces
KB5049296, KB5049235, KB5046365, KB5039747
+3 earlier KB5037331, KB5035123, KB5033688
Replaced by
KB5058722
VersionBuildChannel
2019 15.0.4430.1 General availability

Security

No vulnerabilities are listed for this update.

Downloads (Microsoft Update Catalog)

Package 2019
887.6 MB
sqlserver2019-kb5054833-x64.exe Main update · KB5054833 SHA-1: 88b01079…e21e79

Sources

Updated
Cited passages from Microsoft's official notes (2)
  1. 1. Fixes an issue in which patching a read-scale availability group causes the availability group on the patched replica to be removed. support.microsoft.com
  2. 2. Queries that use the built-in SESSION_CONTEXT function might return incorrect results or trigger access violation (AV) dump files when run in parallel query plans. support.microsoft.com
Checked automatically: 8 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: passed

A second AI read the text against the sources: correctness 4/5, 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