Is CVE-2026-16839 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-16839?

CVE-2026-16839 has a CVSS v3 severity of CRITICAL (9.4).

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CVE-2026-16839

Description

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to obtain sensitive information due to an integer underflow in the IPv4 IP-options parser.