Stealthy RCE on Hardened Linux: noexec + Userland Execution PoC
Summary
Security research post describing a stealthy RCE on Hardened Linux where execution occurs entirely in userland on noexec/nosuid/nodev mounts. It details the attack chain, in-process ELF loading, and memfd-based payload delivery, with practical demonstrations and suggested mitigations. The article highlights how kernel protections can be bypassed and what defenders can do to harden systems.