$ 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
File_parser NNS 2026 – files
Flagchecking_as_a_Service KalmarCTF 2026 49.97 files
Flytvast Undutmaning 2026 33.00 files
Food_Inspector_I GPN 2026 – files
Fortune_Teller FortID 2026 45.00 files
Free_Challenge BoroCTF 2026 – files
Freight_Yard Universal 2026 25.00 files
Fridge 0xFUN 2026 17.74 files
From_Russia_With_Love JerseyCTF 2026 37.00 files
Future_Diary COMPFEST 2026 – files
GAMBL Bearcat 2026 – files
GDB_SaaS FortID 2026 45.00 files
GIF_Splitter Undutmaning 2026 33.00 files
Gate_Way LilacCTF 2026 25.00 files
Gatekeeper_v2.0 SAS 2026 Quals 31.00 files
Generous_Allocator upCTF 2026 24.42 files
Ghazal_Edge 0xV01D 2026 19.48 files
Glyph_Cache LYKNCTF 2026 – files
Goodbye_libc TAMUctf 2026 – files
Grande_Inutile_Tool PascalCTF 2026 24.00 files
Greetings TJCTF 2026 – files
Guessing_game BrunnerCTF 2026 24.66 files
HRBot BrunnerCTF 2026 24.66 files
Happy_Cat_Jail THJCC 2026 – files
Heapshifter THEMCTF 2026 – files
Hex_to_Int BYUCTF 2026 – files
HisFirstGame CodeVinci 2026 18.57 files
Hour_of_Joy UTCTF 2026 – files
House_of_ekko Securinets 2026 Quals 85.12 files
House_of_ekko_revenge Securinets 2026 Quals 85.12 files
Houston_we_have_a_problem BoroCTF 2026 – files
Hungry_Goats tkbctf 2026 25.00 files
Hypertext_Preprocessor MntcrlCTF 2026 25.00 files
I_ate_something_bad_... THJCC 2026 Summer – files
Incontinent BYUCTF 2026 – files
IntegrityCore FromDuskTillDawn 2026 Quals 20.14 files
Intro_2 BYUCTF 2026 – files
Intro_to_PWN_1 CSCG 2026 – files
Intro_to_PWN_2 CSCG 2026 – files
Its_Good_to_Be_Back_on_the_Air... Kind4SUS 2026 – files