CVE-2026-16931: IBM I

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to cause a denial of service due to improper handling of zero-length TCP options.

Affected products

• IBM I: from 7.3, up to and including 7.6

Published 2026-08-12. Last modified 2026-08-13.