CVE-2001-1554: IBM Aix

Medium severity, CVSS 5.0. EPSS: 1.2% chance of exploitation in the next 30 days.

IBM AIX 430 does not properly unlock IPPMTU_LOCK, which allows remote attackers to cause a denial of service (hang) via Path Maximum Transmit Unit (PMTU) IP packets.

Affected products

• IBM Aix: version 430 only

Published 2001-12-31. Last modified 2026-06-16.