CVE-2026-17270: IBM I

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a local attacker to cause a denial of service due to a stack-based buffer overflow.

Affected products

• IBM I: version 7.3 only; version 7.4 only; version 7.5 only; version 7.6 only

Published 2026-09-04. Last modified 2026-09-10.