Misc CTF challenges

3,995 Misc CTF challenges from 420 CTFs (2011–2026), 705 with writeups.

Top misc techniques

Challenges

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Challenge	CTF	Weight	Has
baffling_buffer_1 #ret2win	MetaCTF 2020	–	files wu 1
baby-pwn #ret2libc #stack-buffer-overflow	Rooters 2019	24.23	files wu 1
Patches #ret2libc #got-leak	BSidesBOS 2020	25.00	files wu 1
baffling_buffer_2 #ret2libc	MetaCTF 2020	–	files wu 1
Bacon #ret2dlresolve	HacktivityCon 2020	21.86	files wu 1
cache_v2 #refcount-overflow #use-after-free (uaf)	TetCTF 2021	25.00	files wu 1
invisible #realloc-zero-size-free #double-free #fastbin	ASIS 2020 Quals	64.97	files wu 1
MiscPwn #realloc-hook-malloc-hook-overwrite #one-gadget	BackdoorCTF 2019	56.00	files wu 1
Tornado_Warning #radio-signal-decoding #sdr	UIUCTF 2023	–	files wu 1
cfgo-LuckyMaze #race-condition #golang-pwn #stack-overflow	WMCTF 2020	–	files wu 1
lost #race-condition	InCTF 2018	25.00	files wu 1
maid #rabin-cryptosystem #modulus-recovery-gcd #decryption-oracle	Crypto 2021	36.00	files wu 1
quant #quantum-computing #grovers-algorithm	UMDCTF 2026	–	files wu 1
Quick_Recovery #qr-code-reconstruction #brute-force-permutation	1337UP 2024	–	files wu 1
QR_God #qr-code #error-correction	SekaiCTF 2023	24.86	files wu 1
Odd_One_Out #qr-code	UMassCTF 2025	48.38	files wu 1
Green_Computing_1 #qemu-monitor	hxp 2018	42.00	files wu 1
q-escape #qemu-escape #vm-escape	SECCON 2018 Quals	36.92	files wu 1
unhackable #qemu #physical-memory-dump #memory-forensics	CyberSecurityRumble 2020	28.00	files wu 1
Astea #python-jail-escape #ast	UIUCTF 2024	–	files wu 1
diligent_auditor #python-jail #audit-hook-bypass #sandbox-escape	DiceCTF 2024 Quals	54.40	files wu 1
ML_Pyjail #pyjail #ml-classifier-bypass #string-concatenation	PatriotCTF 2023	24.52	files wu 1
Tsukis_Rhythm_Game #pyinstaller #aes-cbc #marshal-bytecode #malware-c2	R3CTF 2026	35.95	files wu 1
revenge_of_pwn #pwntools-abuse	HITCON 2020	–	files wu 1
cg_casino #proc-self-environ #arbitrary-file-read	Codegate 2019 Quals	–	files wu 1
Miku_vs._Machine #ppc #scheduling-algorithm	SekaiCTF 2024	36.96	files wu 1
yet_another_house #poison-null-byte #tcache-stash-unlink #tcache-poisoning #seccomp-bypass	ASIS 2020 Finals	64.97	files wu 1
ghost_in_the_heap #poison-null-byte	HITCON 2017 Quals	69.38	files wu 1
coalminer #pointer-overwrite #got-leak #ret2libc	UMDCTF 2020	–	files wu 1
Blinky #pointer-authentication #speculative-execution #cache-side-channel #mips	R3CTF 2026	35.95	files wu 1
babyphp #php-code-injection	Hack.lu 2018	72.75	files wu 1
Mafia_at_the_end_1 #pcap #irc #smart-contract #etherscan	PwnMe 2025 Quals	24.95	files wu 1
Graffiti_in_the_Fog #pca #data-analysis	TSG 2023	–	files wu 1
Cipher #passphrase-bruteforce	KubSTU 2026	24.83	files wu 1
warmup #overlapping-chunks	N1CTF 2019	24.41	files wu 1
M-x_5x5 #out-of-bounds (oob)#stack-overflow #ret2win	watevrCTF 2019	24.92	files wu 1
findme #osint #image-geolocation	CrewCTF 2023	20.33	files wu 1
Roldy #order-preserving-encryption #binary-search-oracle	Crypto 2023	59.60	files wu 1
Did_it #oracle-set-membership-leak #quadratic-residue-mapping	Crypto 2023	59.60	files wu 1
NetFS_1 #oracle-attack #password-bruteforce	zer0pts 2023	52.62	files wu 1