Microsoft SQL Server SQL Server 2025 Update Version 17.0.4075.5

KB5104822 updates Microsoft SQL Server 2025 to version 17.0.4075.5. It includes 11 fixes, adds encryption support for PolyBase gRPC communication on Linux, and introduces a new optional `@multi_subnet_failover` parameter to `sp_adddistributor`.

• Enable encryption with Extended Protection to help secure SQL Server on Windows.
• Fixes include security-relevant hardening for communication between the PolyBase external service and gRPC clients on Linux.

• Restoring a database with VSS and WITH MOVE can be slow or time out on servers with many databases.
• An index rebuild maintenance plan can stop responding because of a long-running query.
• SQL Server Setup may recommend 128 GB max server memory instead of 256 GB for Standard and Standard Developer editions.
• Changing collation during initial setup can block mssql-conf unexpectedly on high-CPU Linux systems.
• OPENJSON can return unexpected rows when a JSON path contains special pattern-matching characters.
• DBCC CHECKTABLE with EXTENDED_LOGICAL_CHECKS can assert and dump for persisted computed columns using native json.
• JSON_MODIFY can fail with errors 13643, 7102, or 13647 when working with large native json arrays.

• Adds encryption support for communication between the PolyBase external service and gRPC clients on Linux.
• Adds a new optional parameter, @multi_subnet_failover, to sp_adddistributor.

• SESSION_CONTEXT in parallel plans can return incorrect results or cause access violation dump files, especially when a session is reset for reuse.
• Linked server queries that use MSDASQL with a provider string can fail with error 7416 due to stricter connection validation.
• Queries against sys.dm_exec_requests during database recovery can raise an access violation and dump file.
• Mitigation for the recovery-related access violation includes enabling trace flag 4696, avoiding sys.dm_exec_requests queries on recovering databases, or uninstalling the update.

• A downloadable Excel workbook provides build summaries and detailed fix lists for SQL Server 2025, 2022, 2019, and 2017.
• Bug reference IDs in the fix table can be used as URL bookmarks in the #NNNNNNN format.
• This update includes components for SQL Server Engine and Analysis Services; the target build is 17.0.4075.5.

Product Information

Vendor: Microsoft

Product: SQL Server

Product type: Software

Variant: SQL Server 2025

Version: 17.0.4075.5

Vendor information published: Aug 13, 2026

Original release notes: View on vendor site

Published on updatealert.io: Sep 29, 2026