$ 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

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Challenge CTF Weight Has
Kachow NNS 2025 – files
KalmarVM KalmarCTF 2025 33.89 files
Kanglixia ASIS 2025 Finals 96.29 files
Kernel_Kapers h4ckc0n 2025 24.23 files
Kernel_Mailinglists bi0sCTF 2025 95.79 files
Kiddy_Pool JerseyCTF 2025 24.73 files
KindAuthor Junior.Crypt 2025 23.13 files
Kinderheim_511 Srdnlen 2025 – files
Knight_Bank KnightCTF 2025 18.78 files
Kogarashi_Cafe_The_First_Visit ApoorvCTF 2025 24.10 files
Kogarashi_Cafe_The_Forbidden_Recipe ApoorvCTF 2025 24.10 files
Kogarashi_Cafe_The_Secret_Blend ApoorvCTF 2025 24.10 files
LabGrown WolvCTF 2025 47.25 files
Laconic CyberApocalypse 2025 – files
Ladder_To_Heaven JerseyCTF 2025 24.73 files
Langur Auvergnhack 2025 – files
LeakLess HITCON 2025 – files
Leakcan 1753CTF 2025 34.82 files
Leaky_Key_Management FortID 2025 30.00 files
Length_Calculator IERAE 2025 – files
Let_Me_Go_To_SATurn Kind4SUS 2025 – files
Let_The_TV_Buffer Shakti 2025 34.10 files
Library L3HCTF 2025 54.67 files
Little_ROP idekCTF 2025 52.06 files
Localstack TSCCTF 2025 – files
Locked_Out DEADFACE 2025 – files
Lolimancer BackdoorCTF 2025 – files
LooneyDroid N0PSctf 2025 24.34 files
Lost_Memory NahamCon 2025 53.77 files
Lua.efi UIUCTF 2025 – files
Luck 1753CTF 2025 34.82 files
Lucky DeadSec 2025 31.29 files
MIOT ASIS 2025 Finals 96.29 files
MIPS BYUCTF 2025 – files
MUCUSKY TFC 2025 – files
Madate_Vanter FooBarCTF 2025 25.00 files
Maestro_Revenge KalmarCTF 2025 33.89 files
MagicVault BreachCTF 2025 23.86 files
Makeine BackdoorCTF 2025 – files
Mallo_r_cy JerseyCTF 2025 24.73 files