The most severe Linux threat to surface in years catches the world flat-footed
A critical Linux kernel vulnerability named CopyFail, tracked as CVE-2026-31431, allows local privilege escalation to root on nearly all Linux distributions using a single, reliable exploit script. The flaw affects shared environments like multi-tenant servers, Kubernetes containers, and CI/CD pipelines, increasing the risk of widespread system compromise. Although patches exist for specific kernel versions, most Linux distributions had not yet incorporated them when the exploit was publicly released.
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QUICK, DROP WHAT YOU’RE DOING AND READ The most severe Linux threat to surface in years catches the world flat-footed CopyFail threatens multi-tenant servers, CI/CD work flows, Kubernetes containers, and more. Dan Goodin – Apr 30, 2026 4:20 pm | 27 Credit: Getty Images Credit: Getty Images Text settings Story text Size Small Standard Large Width * Standard Wide Links Standard Orange * Subscribers only Learn more Minimize to nav Publicly released exploit code for an effectively unpatched vulnerability that gives root access to virtually all releases of Linux is setting off alarm bells as defenders scramble to ward off severe compromises inside data centers and on personal devices.
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