#1
Ars Technica Security
general
April 30, 2026 at 20:20 UTC
The most severe Linux threat to surface in years catches the world flat-footed
By Dan Goodin
AI Summary
The CopyFail vulnerability (CVE-2026-31431) affecting Linux kernels since 2017 allows unprivileged local users to gain root access by writing four controlled bytes into the page cache of readable files. This impacts multi-tenant servers, CI/CD pipelines, and Kubernetes containers across all major distributions.
Relevance score: 98.0/100
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