Race condition in JFS2 on AIX 5.2 and 5.3, when deleting a file while I/O is still occurring for that file, may write data to a different file, which could leak sensitive information.
AIX 4.3.3 through AIX 5.1, when direct remote login is disabled, displays a different message if the password is correct, which allows remote attackers to guess the password via brute force methods.
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.