$ 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
rd RCTF 2025 – files
reloc8 Null 2025 – files
riscy UMassCTF 2025 48.38 files
rw.py DownUnderCTF 2025 91.66 files src
sbsbx VolgaCTF 2025 Quals 27.14 files
scanfun b01lers 2025 44.50 files
scfuck TexSAW 2025 – files
secbof UTCTF 2025 – files
secret_notes HITCON 2025 – files
secure-sandbox x3ctf 2025 – files
secure_dwarf MaltaCTF 2025 Quals 24.95 files
shellcode_printer justCTF 2025 97.20 files
shiftalloc Dreamhack 2025 – files
shortcut CyKor 2025 – files
sigdance CTF@AC 2025 Quals 24.53 files
singular_hole K17 2025 24.83 files
sirokemo_says sknbCTF 2025 – files
skernel BackdoorCTF 2025 – files
sketchy Null 2025 – files
slop TexSAW 2025 – files
slop hxp 2025 – files
small_baby TRX 2025 – files
smart_door_lock TPCTF 2025 – files
speedpwn_2 SekaiCTF 2025 55.00 files
spell_manager Securinets 2025 Quals 70.50 files
sqlate IrisCTF 2025 34.30 files src
squ1rrel_casino squ1rrel 2025 24.25 files
squ1rrel_logon squ1rrel 2025 24.25 files
stack_smashing Ctrl+Space 2025 Quals 25.00 files
stackception_1 LakeCTF 2025 Quals – files
stackception_2 LakeCTF 2025 Quals – files
state_change LA 2025 – files
still_not_malloc LakeCTF 2025 Quals – files
stillest_printf LexingtonInformaticsTournament 2025 67.32 files
struct_person_t Dreamhack 2025 – files
stupId_si_plAs_plAs JailCTF 2025 – files
switchboard PatriotCTF 2025 – files
system_abuse idekCTF 2025 52.06 files
tape justCTF 2025 97.20 files
tasks CPCTF 2025 – files