Pwn CTF challenges

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

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Challenges

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Challenge	CTF	Weight	Has
welkerme #kernel-exploitation #arbitrary-function-call #ret2usr	CakeCTF 2022	–	files wu 1
krwd #kernel-exploitation	TRX 2026	–	files wu 1
Bloat #kernel-exploitation	UTCTF 2022	–	files wu 1
hangbuzz101 #kernel-dos #net-scheduler #qdisc	corCTF 2025	82.00	files wu 1
baby_guess #kernel-canary-leak	N1CTF 2021	53.54	files wu 1
Buafllet #kernel #use-after-free (uaf)	HeroCTF 2024	–	files wu 1
hashbrown #kernel #race-condition #use-after-free (uaf)#fg-kaslr-bypass	DiceCTF 2021	24.82	files wu 1
knote #kernel #ioctl	snakeCTF 2023	–	files wu 1
knock_knock #kernel #idt #interrupt-handler	b01lers 2023	36.84	files wu 1
oboe #kernel #heap-overflow #off-by-one #use-after-free (uaf)#rop #commit-creds #kpti-bypass	DiceCTF 2025 Quals	81.00	files wu 1
break_the_calculator #jsfuck #javascript-eval	Glacier 2022	24.32	files wu 1
Ancient_Monkey #js-engine	Hack.lu 2024	100.00	files wu 1
Native_Coffee_Interface #jni	snakeCTF 2024 Quals	24.79	files wu 1
setjmp #jmpbuf-hijack	HITCON 2024 Quals	100.00	files wu 1
Its_Not_Web_I_Swear #jmp-rsp #shellcode #stack-buffer-overflow	ImaginaryCTF 2021	–	files wu 1
DeadlyFastGraph #jit-type-confusion	InCTF 2021	70.41	files wu 1
kowaiiVm #jit-toctou #rop	bi0sCTF 2024	79.83	files wu 1
BrainJIT #jit-spray #shellcode #brainfuck	zer0pts 2023	52.62	files wu 1
Muktir_Shongket #jit-bytecode-verifier-executor-mismatch #jmp-into-literal #shellcode	BDSec 2026	15.62	files wu 1
Made_In_Mongolia #jit-bug #type-confusion #waf-bypass	Haruulzangi 2026 Quals	–	files wu 1
postfix #jit #seccomp	snakeCTF 2023	–	files wu 1
Ancient_House #jemalloc-corruption	InCTF 2021	70.41	files wu 1
hso-groupie #jbig2 #cve-2021-30860 #heap-exploitation #xpdf	RealWorld 2022	–	files wu 1
JavaScript_After_Core #javascriptcore #jit #ftl #osr-exit #browser-exploitation	PwnSec 2026	33.89	files wu 1
SmallStringStorage #java-hashmap-race	m0leCon 2023 Quals	53.62	files wu 1
secured-java #java-annotation-processor #javac #rce	RealWorld 2022	–	files wu 1
wisdom2 #iopl	hxp 2020	94.00	files wu 1
BabyKitDriver #iokit #macos-kernel	0CTF 2023	–	files wu 1
Over_The_Edge #integer-underflow #uint64-wraparound	1337UP 2023	24.23	files wu 1
bookshelf #integer-underflow #ret2libc	PatriotCTF 2023	24.52	files src wu 1
Money_Printer_2 #integer-underflow #format-string #canary	SanDiego 2023	33.88	files wu 1
memsafed #integer-underflow #arbitrary-write #stack-pivot #pie-leak	zer0pts 2022	35.97	files wu 1
blackout #integer-truncation #heap-overflow	SECCON 2023 Quals	100.00	files wu 1
2038 #integer-overflow #year-2038	BYUCTF 2023	–	files wu 1
Scanwich_Station #integer-overflow #qr-code #image-dimensions	GPN 2026	–	files wu 1
catch_the_frog #integer-overflow #heap-overflow	RCTF 2021	–	files wu 1
Robot_Assembly_Line #integer-overflow #heap-exploitation	SunshineCTF 2023	34.09	files wu 1
MightyDragon #integer-overflow #counting-sort-buffer-overflow #shellcode	0CTF 2018 Quals	–	files wu 1
echo_chamber #integer-overflow #content-length #heap-overflow	SekaiCTF 2026	79.25	files wu 1
accountant #integer-overflow #alloca #stack-overflow #oob-write	zer0pts 2022	35.97	files wu 1