“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 track…”
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T1068Exploitation for Privilege Escalation
86%
“allows any user account, no matter how low - level, to increase their privilege to full admin access. it also allows them to bypass sandboxing and works across all linux versions and distributions. "”
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T1068Exploitation for Privilege Escalation
76%
“page cache of read - only files and ultimately overwrite sensitive files on the system to achieve code execution. " copy fail is the same class of primitive, in a different subsystem, " bugcrowd ' s david brumley said. " the 2017 in - place optimization in algif _ aead allows a p…”
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Summary
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.
"An unprivileged local user can write four controlled bytes into the page cache of any readable file on a Linux