Linux kernel monoculture is infrastructure risk

A repeatable class of page‑cache write bugs (Dirty Pipe, Copy Fail, now Dirty Frag) can be chained to give immediate root across many distributions because they share upstream kernel code. When such an embargo is broken and no patch exists, it leaves servers, cloud hosts, appliances and critical infrastructure simultaneously exposed. — Makes clear that software supply‑chain monoculture (shared upstream components) is a pressing public‑policy and national‑security issue requiring coordinated disclosure, patching, and mitigation policy.