PS4 OS runs on FreeBSD with GRUB bootloader: leak | MyGaming
New FreeBSD Kernel Exploit Discovered by PS4 Developer CTurt | Page 4 | PSXHAX - PSXHACKS
PS4 Runs on Modified Version of FreeBSD, Dubbed Orbis OS | XTREME PS
PS4 File Browser released - CTurt updates his PS4 Playground tools - Wololo.net
NMAP PS4 Research Port TCP / UDP and CVE (FreeBSD) for Devs | PSXHAX - PSXHACKS
Alexandro Sanchez on Twitter: "Several real-time VM introspection tools for guest FreeBSD/Orbis kernels recently arrived in Orbital. Now you can run/debug the PS4 software stack from kernel until /safemode.elf (userland!). Big thanks
FreeBSD vulnerability could potentially impact PS5, PS4 (but don't get your hopes too high on this one...) - Wololo.net