CVE-2023-27555: IBM DB2

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) 11.5 is vulnerable to a denial of service when attempting to use ACR client affinity for unfenced DRDA federation wrappers. IBM X-Force ID: 249187.

Affected products

• IBM DB2: from 11.1, before 11.1.4 (fixed in 11.1.4); from 11.5, before 11.5.8 (fixed in 11.5.8); version 10.5 only; version 11.1.4 only

Published 2023-04-28. Last modified 2026-06-17.