732 Bytes to Root: How Copy Fail (CVE-2026-31431) Silently Pwns Every Linux Box Since 2017

A critical kernel privilege escalation that leaves no trace on disk — and how it works It started with a blog post. On April 29, 2026, Theori's research platform Xint Code quietly dropped a URL: copy.fail. Within hours, security teams across the industry were scrambling. A 732-byte Python script — s