$ ctf42

#speculative-execution CTF challenges

3 CTF challenges using speculative-execution from 3 CTFs (2019–2026), 3 with writeups. Mostly Misc (67%) and Pwn (33%).

Misc · 2 Pwn · 1

Often combined with

#spectre 1 #cache-timing-side-channel 1 #cache-side-channel 1 #pointer-authentication 1 #mips 1 #retbleed 1 #kernel-exploit 1

Challenges

Filter and sort these in the challenge browser →

Challenge CTF Weight Category Has
Spectre
#spectre#speculative-execution#cache-timing-side-channel
 PlaidCTF 2019 95.72 Misc files wu 2
zenerational_aura
#retbleed#kernel-exploit#speculative-execution
 corCTF 2025 82.00 Pwn files wu 1
Blinky
#pointer-authentication#speculative-execution#cache-side-channel#mips
 R3CTF 2026 35.95 Misc files wu 1