The undocumented semconfig system call in BSD freezes the state of semaphores, which allows local users to cause a denial of service of the semaphore system by using the semconfig call.

Buffer overflow in the huh program in the orville-write package allows local users to gain root privileges.

asmon and ascpu in FreeBSD allow local users to gain root privileges via a configuration file.

ip_input.c in BSD-derived TCP/IP implementations allows remote attackers to cause a denial of service (crash or hang) via crafted packets.

FreeBSD VFS cache (vfs_cache) allows local users to cause a denial of service by opening a large number of files.

Buffer overflow in Berkeley automounter daemon (amd) logging facility provided in the Linux am-utils package and others.

FreeBSD, NetBSD, and OpenBSD allow an attacker to cause a denial of service by creating a large number of socket pairs using the socketpair function, setting a large buffer size via setsockopt, then writing large buffers.

Operating systems with shared memory implementations based on BSD 4.4 code allow a user to conduct a denial of service and bypass memory limits (e.g., as specified with rlimits) using mmap or shmget to allocate memory and cause page faults.

A buffer overflow in lsof allows local users to obtain root privilege.

FreeBSD mmap function allows users to modify append-only or immutable files.