CVE-2025-1000: IBM Db2 denial of service

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-05-05 · updated 2026-06-17
Weakness: CWE-770

Description

IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) 11.5.0 through 11.5.9 and 12.1.0 through 12.1.1 could allow an authenticated user to cause a denial of service when connecting to a z/OS database due to improper handling of automatic client rerouting.

Affected products

IBM Db2 for Linux, UNIX and Windows: from 11.5 through 11.5.9; from 12.1.0 through 12.1.1

References

https://www.ibm.com/support/pages/node/7232528
https://security.netapp.com/advisory/ntap-20250516-0002/

Get alerted when CVE-2025-1000 or the next vulnerability affects your stack