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KB5084896 - Cumulative Update 5 for SQL Server 2025

  • Applies to: SQL Server 2025 on Windows, SQL Server 2025 on Linux

Release Date:   May 20, 2026
Version:   17.0.4045.5

Summary

This article describes Cumulative Update (CU5) for Microsoft SQL Server 2025. This update package contains six fixes that were issued after the release of SQL Server 2025 Cumulative Update 4. It updates components in the following builds:

  • SQL Server - Product version: 17.0.4045.5, file version: 2025.170.4045.5
  • Analysis Services - Product version: 17.0.25.223, file version: 2025.170.25.223

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 2025, 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
5090650 Fixes an issue in which an EntryPointNotFoundException for GetNumaNodeProcessorMask2 occurs during SQL Server setup on older Windows OS versions. SQL Setup Patching Windows
5131003 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
5157138 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
5190195 Allows the FulltextIndexVersion2 feature to be enabled by setting the database-scoped configuration fulltext_index_version to 2. Also fixes an issue in which full-text indexing of .docx files produces incorrect results when paragraphs begin in hyperlinks without trailing whitespace in the preceding paragraph. SQL Server Engine Search All
5191365 Fixes a vulnerability that allows SQL injection through the sp_help_spatial_geography_indexand sp_help_spatial_geometry_index stored procedures. SQL Server Engine SQL System CLR Types All
5198210 Adds support for configuring change feed parameters by using mssql.conf. SQL Server Engine Replication Linux

How to obtain or download this CU or the latest CU 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 2025 now

Note

  • Microsoft Download Center always offers the latest SQL Server 2025 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 2025 CU and previously released SQL Server 2025 CU releases.
  • This CU is also available through Windows Server Update Services (WSUS).
  • We recommend that you always install the latest cumulative update that's available.
How to obtain or download the latest cumulative update package for Linux

To update SQL Server 2025 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 2025 Release Notes.

File information

File hash information

You can verify the download by computing the hash of the SQLServer2025-KB5084896-x64.exe file through the following command:

certutil -hashfile SQLServer2025-KB5084896-x64.exe SHA256

File name SHA256 hash
SQLServer2025-KB5084896-x64.exe 1CD6A4CCBCEABFAE58377079ADD3BE96EBD1051B095FD1C02A9C270BC9A718DA
Cumulative Update package file information

Download the list of files that are included in KB5084896.

Notes for this update

Prerequisites

To apply this cumulative update package, you must be running SQL Server 2025.

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 in 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 was already addressed in a released CU.
    • CUs might contain added value over and above hotfixes, such as 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 2025 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 2025.
  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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