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What You Need to Know About New Linux 'Copy Fail' Vulnerability Enables Root ...

Last updated: 2026-04-30 18:40:14 · Cybersecurity

New Linux 'Copy Fail' Vulnerability Enables Root Access on Major Distributions

Cybersecurity researchers have disclosed details of a Linux local privilege escalation (LPE) flaw that could allow an unprivileged local user to obtain root. The high-severity vulnerability tracked as CVE-2026-31431 (CVSS score: 7.8) has been codenamed Copy Fail by Xint.io and Theori.

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Key Details

"An unprivileged local user can write four controlled bytes into the page cache of any readable file on a Linux

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Summary

This article covers the key aspects of new linux 'copy fail' vulnerability enables root access on major distributions. The topic continues to evolve as new developments emerge in this space.

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