CVE

CVE-2026-31431

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Field notes

Analysis · May 3, 2026 · The Field Notes Desk
Copy Fail is a 732-byte root shell. Patch your Linux fleet this week.
CVE-2026-31431 is a deterministic privilege escalation in the Linux kernel affecting versions 4.14 through 6.19. A Python script gives any local user root. Every major distro is affected, containers don't help, and the mitigation is trivial.