CVE-2025-36366 IBM Db2 Denial of Service
An attacker can cause a denial of service in IBM Db2 by executing a specific query that triggers an unhandled exception, terminating the server.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-36366?
CVE-2025-36366 is a medium-severity denial of service vulnerability in Ibm Db2, published on 30 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) could allow a user to cause a denial of service by executing a query that invokes the JSON_Object scalar function, which may trigger an unhandled exception leading to abnormal server termination.
Weakness: CWE-943
Which versions are affected by CVE-2025-36366?
It affects 1 product.
Products include Ibm Db2.
How do I fix CVE-2025-36366?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-36366 being exploited?
There is no known exploitation of CVE-2025-36366 in the wild and no public exploit code.
Other vulnerabilities in Ibm Db2
Sources
Also known as GHSA-mvh2-wmr8-q886, ROOT-OS-UBUNTU-2204-CVE-2025-36366.