CVE-2026-31431 "CopyFail": Linux Local Privilege Escalation Vulnerability Disclosed
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Summary
A Linux kernel vulnerability (CVE-2026-31431), nicknamed "CopyFail," has been disclosed on the oss-security mailing list. The vulnerability allows local privilege escalation on Linux systems. It was introduced in kernel version 4.14 via commit 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 and has since been fixed in subsequent kernel updates. The discussion thread includes technical details about the flaw and its impact on system security.
Key quotes
· 3 pulledSubject: Re: CVE-2026-31431: CopyFail: linux local privilege scalation
Affected and fixed versions ===========================
Issue introduced in 4.14 with commit 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 and fixed in
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