$ ctf42

#kernel CTF challenges

4 CTF challenges using kernel from 3 CTFs (2019–2026), 4 with writeups. Mostly Pwn (50%) and Misc (25%).

Pwn · 2 Misc · 1 Reverse · 1

Often combined with

#use-after-free 3 #race-condition 2 #slab-leak 1 #fg-kaslr-bypass 1 #reversing 1 #kpti-bypass 1 #heap-overflow 1 #off-by-one 1 #commit-creds 1 #rop 1

Challenges

Filter and sort these in the challenge browser →

Challenge CTF Weight Category Has
faulty_road
#kernel#reversing
 TRX 2026 – Reverse files wu 1
Race
#kernel#race-condition#use-after-free (uaf)#slab-leak
 De1CTF 2019 24.28 Misc files wu 1
hashbrown
#kernel#race-condition#use-after-free (uaf)#fg-kaslr-bypass
 DiceCTF 2021 24.82 Pwn files wu 1
oboe
#kernel#heap-overflow#off-by-one#use-after-free (uaf)#rop#commit-creds#kpti-bypass
 DiceCTF 2025 Quals 81.00 Pwn files wu 1