Edit

Share via

KB5077896 - Cumulative Update 3 for SQL Server 2025

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

Release Date:   March 12, 2026
Version:   17.0.4025.3

Summary

This article describes Cumulative Update (CU3) for Microsoft SQL Server 2025. This update package contains 15 fixes that were issued after the release of SQL Server 2025 Cumulative Update 2. It updates components in the following builds:

  • SQL Server - Product version: 17.0.4025.3, file version: 2025.170.4025.3
  • Analysis Services - Product version: 17.0.25.223, file version: 2025.170.25.223

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
4836787 Fixes a performance scalability issue to reduce false sharing and cache line invalidation on large core-count server configurations. SQL Server Engine Column Stores All
4836829 Improves performance scalability on large core-count server configurations. SQL Server Engine Column Stores All
4836855 Improves performance scalability on large core-count server configurations by aligning the I/O completion structure to a 64-byte cache line size. SQL Server Engine Backup Restore All
4845346 Fixes an issue in which using VECTOR functions causes SqlLocalDB to fail. SQL Server Engine SqlLocalDB Windows
4852207 Fixes an assertion error and a dump file that might occur if optimized locking and change tracking are both enabled on a database. SQL Server Engine Storage Engine All
4953808 Fixes an issue in which the configure-only replica of a Contained Availability Group can't be connected after a restart because of a startup failure without the system database. SQL Server Engine High Availability and Disaster Recovery All
4954946 Fixes an issue where using REGEX functions causes SqlLocalDB to crash. SQL Server Engine SqlLocalDB Windows
4955141 Fixes an issue that occurs when using a local monitor server for Log Shipping and Contained Availability Group after failover. SQL Server Engine High Availability and Disaster Recovery All
4955489 Fixes a typo in sys.dm_os_linux_disk_stats by correcting ios_in_progess to ios_in_progress. SQL Connectivity Linux Linux
4986175 Adds support for the Bulkadmin role and ADMINISTER BULK OPERATIONS permissions, allowing secure bulk data import without requiring sysadmin access (Public Preview). SQL Server Engine Security Infrastructure Linux
5002842 Fixes a crash that occurs if a caller requests context that contains only control registers. SQLPAL SQLPAL Linux
5004820 Adds a configurable full-text search batch timeout by using sp_fulltext_service 'batch_timeout'. Specify a value between 1 minute and 1 hour, in milliseconds. By default, batches time out after 10 minutes if there are no progress updates. SQL Server Engine Search All
5004893 Fixes an issue in which changing the SQL Server edition on Linux causes the system to use incorrect log file locations for model and msdb databases. SQL Server Engine Linux Linux
5004967 Adds support for symbolic links in the getattribute API. SQL Server Engine Linux Linux
5013499 Adds a configuration option to add Bulkadmin operations to the allowlist. SQL Server Engine Linux 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-KB5077896-x64.exe file through the following command:

certutil -hashfile SQLServer2025-KB5077896-x64.exe SHA256

File name SHA256 hash
SQLServer2025-KB5077896-x64.exe 13575286CC307A4E52A056477FD8A17E79309680C6A216463F365D4ED919428D
Cumulative Update package file information

Download the list of files that are included in KB5077896.

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 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 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

  • Last updated on