Copy Fail exposes Linux root flaw

This is the kind of kernel bug that stops being “just” a CVE the moment it lands in container hosts, CI runners, and multi-tenant dev boxes. The exploit narrative is unusually stark: tiny payload, broad distro reach, and a claimed no-race, no-offset path from user to root.

• –Shared infra takes the hardest hit: Kubernetes nodes, self-hosted runners, and shell platforms are the obvious blast radius.
• –The public PoC makes validation easy for defenders, but it also lowers the bar for abuse on unpatched systems.
• –The mitigation is straightforward in principle: patch kernels that include the fix, then disable `algif_aead` or block `AF_ALG` where you cannot patch immediately.
• –For AI teams, the practical risk is any place they run untrusted code, model evals, sandboxes, or agent workloads on shared Linux kernels.
• –The disclosure reads like a reminder that old kernel APIs can become high-severity attack surface long after everyone stopped looking at them.