For more details on the discovery process and our findings, we refer to our research paper, which is published at USENIX Security 2026.

paper: stackwarpattack.com
github: github.com/cispa/StackW...

\cc Tristan Hornetz, @d-we.bsky.social, Fabian Thomas, @misc0110.bsky.social

Today we reveal StackWarp: a new CPU vulnerability exploiting a synchronization bug in AMD’s stack engine across Zen 1–5 CPUs. It enables deterministic manipulation of Confidential VM's stack pointer, allowing RCE and privilege escalation via both control- and data-flow hijacking.

@ltrampert.bsky.social and I just gave a talk at Black Hat Asia showing how CSS can be abused to deanonymize you when opening an email!
cc: @blackhatevents.bsky.social #BHASIA25

Heading to Black Hat Asia now! @ltrampert.bsky.social and I will give a briefing about deanonymizing users not only on the web but also in their email clients! #bhasia

Just gave a keynote at #Ruhrsec about threat models, Side channels, fault attacks, how the evolve and how we should approach them...