Quick answers
- Is CVE-2026-6052 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-6052 being exploited in the wild.
- How severe is CVE-2026-6052?
- Medium severity, with a CVSS score of 6.5, published 27 May 2026.
- Which products and versions are affected?
- IBM Db2 11.5.0 - 11.5.9, 12.1.0 - 12.1.4.
- Is there a fix for CVE-2026-6052?
- A patch was published on 2026-05-21: Special builds released for 11.5.9 and 12.1.4 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-6052 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-6052?
- Check whether you run IBM Db2 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
IBM Db2 versions 11.5 (up to 11.5.9) and 12.1 (up to 12.1.4) contain a resource exhaustion vulnerability. The flaw is triggered when the database engine executes specific queries against Multi-Clustering-Dimensional (MDC) tables, leading to excessive memory consumption. An authenticated attacker with network access and the ability to execute queries can exploit this to cause a denial-of-service (DoS) by exhausting available system memory. IBM has released special builds (interim fixes) for versions 11.5.9 and 12.1.4 to address the issue. As a temporary mitigation, users are advised to avoid the use of MDC tables where possible.
Affected products
- IBM Db2 11.5.0 - 11.5.9, 12.1.0 - 12.1.4
Timeline
- 2026-05-21: disclosed: Initial publication by IBM
- 2026-05-21: patched: Special builds released for 11.5.9 and 12.1.4
- 2026-05-27: advisory: NVD publication date