Quick answers
- Is CVE-2026-6053 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-6053 being exploited in the wild.
- How severe is CVE-2026-6053?
- Medium severity, with a CVSS score of 5.5, 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-2026-6053?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-6053 attacked?
- It is attacked with local access, in a software library.
- Am I affected by CVE-2026-6053?
- 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 is vulnerable to a denial of service due to improper resource management (CWE-770) when processing queries against range-partitioned tables. An attacker with local access and low privileges can trigger this vulnerability by executing a specially crafted SQL query. The root cause appears to be related to memory allocation or intra-parallelism processing, as IBM suggests disabling intra-parallelism or increasing application heap memory as potential mitigations. Successful exploitation results in a complete loss of availability for the database service. Fixes are available as special builds for versions 11.5.9 and 12.1.4.
Affected products
- IBM Db2 11.5.0 - 11.5.9, 12.1.0 - 12.1.4
Timeline
- 2026-05-21: advisory: Initial publication by IBM
- 2026-05-27: disclosed: NVD publication date