The most severe Linux threat to surface in years catches the world flat-footed
Summary
Ars Technica reports on CopyFail, a publicly disclosed Linux kernel vulnerability (CVE-2026-31431) that enables root access with a single exploit script. Theorems from Theori show the PoC works across major distros, creating a broad patch gap as many distributions had not yet applied fixes. Security experts warn this could be the most severe Linux kernel vulnerability in years, with potential impacts on multi-tenant servers, containers, and CI/CD pipelines.