CVE-2023-30991: IBM DB2

High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days.

IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 11.1 and 11.5 is vulnerable to denial of service with a specially crafted query. IBM X-Force ID: 254037.

Affected products

• IBM DB2: from 11.5, up to and including 11.5.8; version 11.1.4 only

Published 2023-10-16. Last modified 2026-06-17.