CVE-2026-17255
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 validation of the prefix length in ICMPv6 Router Advertisements.
- Published Sep 4, 2026
- CVSS 7.5 high
- 0.4% chance of exploitation in the next 30 days (EPSS)
- A fix is available