Is CVE-2026-17255 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-17255?

CVE-2026-17255 has a CVSS v3 severity of MEDIUM (4.3).

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CVE-2026-17255

Description

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.