just-in-kernel was a kernel exploitation problem in DownUnderCTF 2022, and had 11 solves by the end of the CTF. We were provided a kernel
initramfs.cpio.gz file, a
launch.sh script to launch the kernel in QEMU, and the following prompt:
A just-in-time compiler implemented completely within the kernel, wow! It's pretty limited in terms of functionality so it must be memory safe, right?