system
Describe <CVE-2001-1559>.
user
What is <CVE-2001-1559>?
assistant
The uipc system calls (uipc_syscalls.c) in OpenBSD 2.9 and 3.0 provide user mode return instead of versus rval kernel mode values to the fdrelease function, which allows local users to cause a denial of service and trigger a null dereference..