Linux Kernel Zero-Day “Copy Fail” (CVE-2026-31431) Grants Root Access on Every Major Distro Since 2017
A newly disclosed Linux kernel zero-day dubbed “Copy Fail” (CVE-2026-31431) allows any unprivileged local user to obtain root access on virtually every major Linux distribution since 2017 using a 732-byte Python script. The flaw affects kernel versions from 4.14 onwards and has been confirmed on Ubuntu, Amazon Linux, RHEL, and SUSE.
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