#use-after-free (uaf) CTF challenges

Also written as uaf.

58 CTF challenges using use-after-free (uaf) from 43 CTFs (2017–2026), 58 with writeups. Mostly Pwn (53%) and Misc (45%).

Often combined with

Challenge	CTF	Weight	Category	Has
Shop #use-after-free (uaf)	SPbCTF 2021 Quals	–	Misc	files wu 1
Use_After_Freedom #use-after-free (uaf)	HSCTF 2021	–	Pwn	files wu 1
Heap-Hop #use-after-free (uaf)	Dragon 2020	98.00	Pwn	files wu 1
TemporaryFileSystemStorage #use-after-free (uaf)	FireShell 2020	24.49	Misc	files wu 1
atoms #use-after-free (uaf)	HITCON 2020	–	Misc	files wu 1
fakev #use-after-free (uaf)	m0leCon 2020 Quals	24.55	Misc	files wu 1
treecache_alyx #use-after-free (uaf)	HSCTF 2020	–	Misc	files wu 1
zombie #use-after-free (uaf)	DownUnderCTF 2020	24.44	Misc	files wu 1
CookShow #use-after-free (uaf)	KipodAfterFree 2019	24.61	Misc	files wu 1
unistruct #stdvariant #iterator-invalidation #use-after-free (uaf)	RCTF 2021	–	Pwn	files wu 1
corchat_v3 #sql-injection #use-after-free (uaf)#tcache-perthread-struct	corCTF 2024	55.00	Pwn	files wu 1
sharing #shared-ptr #refcount-underflow #use-after-free (uaf)	RCTF 2021	–	Pwn	files wu 1
cache_v2 #refcount-overflow #use-after-free (uaf)	TetCTF 2021	25.00	Misc	files wu 1
kSMS_Secure_Message_Storage #kernel-exploitation #use-after-free (uaf)	TeamItaly 2023	24.88	Pwn	files wu 1
Race #kernel #race-condition #use-after-free (uaf)#slab-leak	De1CTF 2019	24.28	Misc	files wu 1
hashbrown #kernel #race-condition #use-after-free (uaf)#fg-kaslr-bypass	DiceCTF 2021	24.82	Pwn	files wu 1
oboe #kernel #heap-overflow #off-by-one #use-after-free (uaf)#rop #commit-creds #kpti-bypass	DiceCTF 2025 Quals	81.00	Pwn	files wu 1
popcorn #heap #use-after-free (uaf)#function-pointer-overwrite #ret2win	DeadSec 2023	23.96	Pwn	files wu 1