$ ctf42

Pwn CTF challenges

3,926 Pwn CTF challenges from 382 CTFs (2011–2026), 1,025 with writeups.

Top pwn techniques

#stack-buffer-overflow 95 #format-string 88 #rop 76 #use-after-free 56 #ret2win 55 #shellcode 48 #ret2libc 37 #heap 35 #heap-overflow 34 #tcache-poisoning 29 #got-overwrite 29 #stack-pivot 25 #buffer-overflow 23 #heap-exploitation 21 #seccomp 19

Challenges

Filter and sort these in the challenge browser →

Challenge CTF Weight Has
headache JailCTF 2025 – files
holes K17 2025 24.83 files
http101 openECSC 2025 – files
http202 openECSC 2025 – files
i_love_birds TJCTF 2025 – files
idempotence VuwCTF 2025 – files
iloverust BuckeyeCTF 2025 – files
imagemap_generator osuigaming 2025 – files
impossible_string_challenge LexingtonInformaticsTournament 2025 67.32 files
into_the_void K17 2025 24.83 files
intro_pwn WATCTF 2025 – files
jCTFcoin justCTF 2025 97.20 files
jaili squ1rrel 2025 24.25 files
js BSidesAlgiers 2025 – files
kRWX ToH 2025 24.27 files
kiwiphone VuwCTF 2025 – files
ktou N1CTF 2025 – files
kufvm sknbCTF 2025 – files
l1t_x00n3wsAAAAAAApp_n LexingtonInformaticsTournament 2025 67.32 files
lamp LA 2025 – files
leap_of_faith Kashi 2025 21.78 files
library LA 2025 – files
linked TJCTF 2025 – files
loadall.js KalmarCTF 2025 33.89 files
locked_room DiceCTF 2025 Quals 81.00 files
login MaltaCTF 2025 Quals 24.95 files
loginator_2 CTFZone 2025 Quals 92.45 files
losecash b01lers 2025 44.50 files
luma_chain UNbreakableInternational 2025 Quals – files
malloc_wrapper_part_1 QnQSec 2025 24.76 files
malloc_wrapper_part_2 QnQSec 2025 24.76 files
md7 Securinets CTF 2025 Quals – files
minceraft LA 2025 – files
minesweeper pingCTF 2025 32.50 files
miss_analyzer_v2 osuigaming 2025 – files
mmapro LA 2025 – files
mstr RCTF 2025 – files
multiarch_2 GoogleCTF 2025 – files
my_note PwnSec 2025 – files
myspace2 idekCTF 2025 52.06 files