$ 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
memory
#heap-exploitation#seccomp#orw
 Securinets 2022 Quals 50.11 files wu 1
easy_note
#heap-exploitation#realloc
 b01lers 2024 30.80 files wu 1
kvstore
#heap-exploitation#oob-read#memcmp-leak
 zer0pts 2022 35.97 files wu 1
simultaneity
#heap-exploitation#mmap-chunk
 redpwn 2021 32.61 files wu 1
onetestament
#heap-exploitation#fastbin
 insomnihack 2022 Quals 21.38 files wu 1
babyheap
#heap-exploitation
 TCP1P 2023 97.33 files wu 1
tickery
#heap-exploitation
 TCP1P 2023 97.33 files wu 1
UseTheForceLuke
#heap-exploitation
 SpaceHeroes 2022 23.94 files wu 1
popcorn
#heap#use-after-free (uaf)#function-pointer-overwrite#ret2win
 DeadSec 2023 23.96 files wu 1
Warmup
#heap#tcache#libc-2-27
 darkCON 2021 24.06 files wu 1
SiceSiceBaby
#heap#off-by-one-null#tcache#glibc
 DiceCTF 2021 24.82 files wu 1
baby_talk
#heap#off-by-null#house-of-einherjar#tcache-poisoning#free-hook
 DiceCTF 2024 Quals 54.40 files wu 1
Just_another_heap
#heap#null-pointer-write#write-what-where#got-overwrite
 DCTF 2021 – files wu 1
softshell
#heap#linked-list#argument-count-mismatch#arbitrary-write
 PatriotCTF 2023 24.52 files src wu 1
Heappie
#heap#function-pointer-overwrite
 HeroCTF 2024 – files wu 1
pwnymalloc
#heap#coalesce-bug#custom-allocator
 UIUCTF 2024 – files wu 1
buggy_pizzeria
#heap
 snakeCTF 2023 – files wu 1
FreeWin
#heap
 PwnMe 2022 – files wu 1
bookface
#heap
 angstromCTF 2020 – files wu 1
Arena_Snapshots
#handle-forgery#generation-confusion
 ASIS 2026 Quals 90.53 files wu 1
Nim
#got-overwrite
 Dragon 2021 99.33 files wu 1
Invaders
#godot-game-reversing
 N0PSctf 2025 24.34 files wu 1
NakiriAyame
#go-reversing
 TCP1P 2023 97.33 files wu 1
Baby_Glob
#glob-tilde-overflow
 InCTF 2021 70.41 files wu 1
emojidb
#glibc-bug#fputws-closed-stderr#oob-write
 PlaidCTF 2020 93.15 files wu 1
lets_get_to_library
#gets#stack-buffer-overflow#ret2libc
 KBxAc 2026 – files wu 1
save_tyger
#gets#stack-buffer-overflow
 LexingtonInformaticsTournament 2022 23.87 files wu 1
tranquil
#gets#ret2win#stack-buffer-overflow
 angstromCTF 2021 – files wu 1
Aquarium
#gets#ret2win#stack-buffer-overflow
 angstromCTF 2019 – files wu 1
Signal_Race
#generation-counter-wraparound#use-after-free (uaf)#murmurhash-inversion
 ASIS 2026 Quals 90.53 files wu 1
Helpful_Debugger
#gdb-autoload-exploit
 TAMUctf 2021 – files wu 1
baba_is_you
#gameboy
 hxp 2021 99.41 files wu 1
Hibana
#game-hacking#frida
 SekaiCTF 2023 24.86 files wu 1
Drone_Adventure
#fuzzing#afl
 SunshineCTF 2024 38.57 files wu 1
V-tables
#fsop#vtable
 Securinets CTF 2025 Quals – files wu 1
CSTutorial
#fsop#mmap#out-of-bounds (oob)
 SEETF 2023 – files wu 1
speedpwn
#fsop#file-structure
 SekaiCTF 2024 36.96 files wu 1
Bytecode
#fsop#bytecode-interpreter
 Akasec 2024 23.15 files wu 1
house_of_tataru
#fsop
 N1CTF 2021 53.54 files wu 1
Food_Inspector_II
#frida#dynamic-instrumentation
 GPN 2026 – files wu 1