Microsoft SQL Server SQL Server 2025 Update Version 17.0.4035.5

KB5081495 delivers Cumulative Update 4 for Microsoft SQL Server 2025. It includes 11 fixes and updates SQL Server to 17.0.4035.5, with known issues affecting `SESSION_CONTEXT` in parallel plans and some MSDASQL linked server queries.

• Fixes a memory corruption issue in audit functionality for contained availability groups.
• Fixes an access violation error when querying sys.dm_xe_session_targets on Windows Server 2025.
• Fixes non-yielding scheduler errors and dump files that might occur during heavy lazy writer I/O.

• Database Mail in contained availability groups could send messages without attachments when using sp_RunMailQuery.
• Permissions on stored procedures and other objects in msdb could be lost during SQL Server upgrade.
• SQL Server on Linux could enter an unintended wait state on an internal thread that does not support suspension.
• DTSWizard.exe would not open when SQL Server was installed without SSIS features.
• Indexing certain Microsoft Word 6.0 documents with Full-Text Search could cause fdhost.exe to stop responding.
• Limits Json_contains comparison mode to 0 (exact match) or 1 (pattern match).
• Contained availability groups now restrict adding databases to the currently connected CAG; DBCreator is also restricted to the current CAG and requires the database owner to match the logged-in user.
• Inflectional Full-Text Search queries could fail for version 2 languages that do not implement an IStemmer.

• Queries that use SESSION_CONTEXT may return incorrect results or trigger access violation dump files when run in parallel query plans, especially if the session is reset for reuse.
• Linked server queries that use MSDASQL with a provider string may fail with error 7416: Access to the remote server is denied because no login-mapping exists.

• Applies to SQL Server 2025 on Windows and Linux.
• Updates SQL Server to version 17.0.4035.5 and Analysis Services to version 17.0.25.223.
• A downloadable Excel workbook is available with build summaries and detailed fix lists for SQL Server 2025, 2022, 2019, and 2017.

Product Information

Vendor: Microsoft

Product: SQL Server

Product type: Software

Variant: SQL Server 2025

Version: 17.0.4035.5

Vendor information published: Apr 16, 2026

Original release notes: View on vendor site

Published on updatealert.io: Sep 29, 2026