Buffer overflow in the diagnostics library in AIX allows local users to "cause data and instructions to be overwritten" via a long DIAGNOSTICS environment variable.
Buffer overflow in rpc.yppasswdd (yppasswd server) in AIX allows attackers to gain unauthorized access via a long string. NOTE: due to lack of details in the vendor advisory, it is not clear if this is the same issue as CVE-2001-0779.
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.