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KB5081477 - Cumulative Update 25 for SQL Server 2022

  • Applies to: SQL Server 2022 on Windows, SQL Server 2022 on Linux

Release Date:   May 20, 2026
Version:   16.0.4255.1

Summary

This article describes Cumulative Update package 25 (CU25) for Microsoft SQL Server 2022. This update contains 11 fixes that were issued after the release of SQL Server 2022 Cumulative Update 24. It updates components in the following builds:

  • SQL Server - Product version: 16.0.4255.1, file version: 2022.160.4255.1
  • Analysis Services - Product version: 16.0.43.252, file version: 2022.160.43.252

Important

To help secure SQL Server on Windows, enable encryption with Extended Protection.

Known issues in this update

Incorrect behavior of SESSION_CONTEXT in parallel plans

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. This issue occurs because of the manner in which SESSION_CONTEXT interacts with parallel execution threads, particularly if the session is reset for reuse.

For more information, see the Known issues section in SESSION_CONTEXT.

Improvements and fixes included in this update

A downloadable Microsoft Excel workbook that contains a summary list of builds, together with their current support lifecycle, is available. The Excel file also contains detailed fix lists for SQL Server 2022, SQL Server 2019, and SQL Server 2017. Download this Excel file now.

Note

Individual entries in the following table can be referenced directly through a bookmark. If you select any bug reference ID in the table, a bookmark tag is added to the URL by using the "#NNNNNNN" format. You can then share this URL with others so that they can jump directly to the desired fix in the table.

For more information about the bugs that are fixed and enhancements that are included in this cumulative update, see the following table.

Bug reference Description Fix area Component Platform
4954485 Fixes an issue in Contained Availability Groups in which DatabaseMail sends email messages without attachments. SQL Server Client Tools Database Mail All
4999187 Fixes an issue in which permissions on stored procedures and other objects in msdb are lost during the SQL Server upgrade process. This issue causes users to lose granted permissions. SQL Server Engine Management Services Windows
5028794 Fixes an access violation error that occurs when querying sys.dm_xe_session_targets on SQL Server instances that are running on Windows Server 2025. SQL Server Engine SQL OS Windows
5033534 Fixes an issue in Contained Availability Group connections in which T-SQL allows only adding a database to the currently connected Contained Availability Group, and also causes additional restrictions for DBCreator roles. SQL Server Engine High Availability and Disaster Recovery All
5034739 Fixes a memory leak issue in which parallel execution of SHORTEST_PATH queries in Graph databases causes persistent OBJECTSTORE_SOSTASK growth. SQL Server Engine Query Optimizer All
5090699 Fixes an issue in which a self-assignment update on a small off-row XML column by having compression enabled causes XML data corruption and a subsequent transport-level error when selecting the data. SQL Server Engine Access Methods All
5126699 Fixes an issue in which using the Oracle ODBC driver together with the ODBC connector in SSIS packages might cause heap corruption and data loss. Integration Services Integration Services All
5130873 Fixes a heap corruption issue in the generic ODBC connector when using the Oracle ODBC driver. Integration Services Integration Services All
5131000 Fixes an XML External Entity (XXE) vulnerability in the Web Service Task by blocking the file:// protocol in WSDL service endpoints to prevent unauthorized file access and denial-of-service attacks. Integration Services Integration Services Windows
5157137 Fixes CPU starvation issues by adding yields at regular intervals during in-memory OLTP garbage collection scan of hash indexes. SQL Server Engine In-Memory OLTP All
5213660 Fixes a back-up cleanup issue on Linux that could cause SQL Server to stop responding when a network share becomes full or unreachable. SQL Server Engine Linux Linux

How to obtain or download this or the latest cumulative update package

How to obtain or download the latest cumulative update package for Windows (recommended)

The following update is available from the Microsoft Download Center:

Download the latest cumulative update package for SQL Server 2022 now

Note

  • Microsoft Download Center always offers the latest SQL Server 2022 CU release.
  • If the download page doesn't appear, contact Microsoft Customer Service and Support to obtain the cumulative update package.
How to obtain or download this cumulative update package for Windows from Microsoft Update Catalog

The following update is available from the Microsoft Update Catalog:

Note

  • Microsoft Update Catalog contains this SQL Server 2022 CU and previously released SQL Server 2022 CU releases.
  • This CU is also available through Windows Server Update Services (WSUS).
  • We recommend that you always install the latest cumulative update that is available.
How to obtain or download the latest cumulative update package for Linux

To update SQL Server 2022 on Linux to the latest CU, you must first have the Cumulative Update repository configured. Then, update your SQL Server packages by using the appropriate platform-specific update command.

For installation instructions and direct links to the CU package downloads, see the SQL Server 2022 Release Notes.

File information

File hash information

You can verify the download by computing the hash of the SQLServer2022-KB5081477-x64.exe file through the following command:

certutil -hashfile SQLServer2022-KB5081477-x64.exe SHA256

File name SHA256 hash
SQLServer2022-KB5081477-x64.exe 16EC12DBFABC6F4CC52CC32C273AD98881E96078F3EA05085CFA11C2985E94C9
Cumulative Update package file information

Download the list of files that are included in KB5081477.

Notes for this update

Prerequisites

To apply this cumulative update package, you must be running SQL Server 2022.

Restart information

You might have to restart the computer after you apply this cumulative update package.

Registry information

To use one of the hotfixes in this package, you don't have to make any changes to the registry.

Important notices

This article also provides the following important information.

Analysis Services CU build version

Beginning in Microsoft SQL Server 2017, the Analysis Services build version number and SQL Server Database Engine build version number don't match. For more information, see Verify Analysis Services cumulative update build version.

Cumulative updates (CU)

  • Each new CU contains all the fixes that were included with the previous CU for the installed version of SQL Server.
  • SQL Server CUs are certified to the same levels as service packs, and should be installed at the same level of confidence.
  • We recommend ongoing, proactive installation of CUs as they become available according to these guidelines:
    • Historical data shows that a significant number of support cases involve an issue that has already been addressed in a released CU.
    • CUs might contain added value over and above hotfixes. This includes supportability, manageability, and reliability updates.
  • We recommend that you test SQL Server CUs before you deploy them to production environments.
Hybrid environment deployment

When you deploy an update to a hybrid environment (such as Always On, replication, cluster, and mirroring), we recommend that you refer to the following articles before you deploy the update:

Language support

SQL Server CUs are currently multilingual. Therefore, this CU package isn't specific to one language. It applies to all supported languages.

Components (features) updated

One CU package includes all available updates for all SQL Server 2022 components (features). However, the cumulative update package updates only those components that are currently installed on the SQL Server instance that you select to be serviced. If a SQL Server feature (for example, Analysis Services) is added to the instance after this CU is applied, you must reapply this CU to update the new feature to this CU.

Support for this update

If other issues occur, or if any troubleshooting is required, you might have to create a service request. The usual support costs will apply to additional support questions and to issues that don't qualify for this specific cumulative update package. For a complete list of Microsoft Customer Service and Support telephone numbers, or to create a separate service request, go to the Microsoft support website.

How to uninstall this update

How to uninstall this update on Windows
  1. In Control Panel, open the Programs and Features item, and then select View installed updates.
  2. Locate the entry that corresponds to this cumulative update package under SQL Server 2022.
  3. Press and hold (or right-click) the entry, and then select Uninstall.
How to uninstall this update on Linux

To uninstall this CU on Linux, you must roll back the package to the previous version. For more information about how to roll back the installation, see Rollback SQL Server.

References

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