SQL Server 2025 CU5 crashes with EXCEPTION_ACCESS_VIOLATION during INSERT into table with JSON index

Question

SQL Server 2025 CU5 crashes with EXCEPTION_ACCESS_VIOLATION during INSERT into table with JSON index

Anonymous

Product: SQL Server

Version: SQL Server 2025 / 17.0.4045.5 CU5

Severity: Production SQL Server crash / service interruption

Summary: SQL Server process crashes with c0000005 EXCEPTION_ACCESS_VIOLATION during parametrized INSERT statements into backend tables using JSON indexes. Issue occurred before CU5 on 17.0.1115.1 and still occurs after update to 17.0.4045.5.

Viorel 127K Reputation points

2026-06-26T12:57:14.07+00:00

Have you already found an example of a problematic statement and data?

1 answer

Your answer

Viorel 127K Reputation points

2026-06-26T12:57:14.07+00:00

Have you already found an example of a problematic statement and data?

Answer 1

Erland Sommarskog 135.1K MVP Volunteer Moderator

Do you have a script to demonstrate the issue?

This is obviously a bug. There are two ways you can go. One is to report it on https://feedback.azure.com/d365community/forum/04fe6ee0-3b25-ec11-b6e6-000d3a4f0da0 This is only serves to let Microsoft know about the issue. They may fix it, with the priority they deem suitable. For a report here to be meaningful, it is imperative that you have repro that demonstrates the issue, or else Microsoft has nothing work from.

If this is a stopping issue and you are in need of a fix, you need to open a support case. Here you can argue with the support engineer about the business impact. The stronger it is, the more likely that you will get a fix.

What you say seems vaguely familiar; I might have seen someone else reporting the same thing, but I don't recall where.

Lakshmi Narayana Garikapati 1,335 Reputation points Microsoft External Staff Moderator

2026-07-01T05:46:51.54+00:00

Hi @Viorel ,

Following up to confirm if the earlier responses addressed your query. If not, please share your questions and we'll assist further

Thanks,

Lakshmi