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Copy Fail Hits Linux: Tiny 4-Byte Flaw Opens Door to Root Access

A newly disclosed Linux kernel flaw called Copy Fail has raised concern across cybersecurity teams. Tracked as CVE-2026-31431, the bug can let a normal local user gain root access on affected systems and may create added risk for Kubernetes, CI runners, and shared Linux servers.

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13 Articles

Linuxiac

Copy Fail Linux Kernel Flaw Allows Local Users to Gain Root

Copy Fail (CVE-2026-31431) is a Linux kernel vulnerability that allows local unprivileged users to gain root access on affected systems.

1 hour ago

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Clubic.com

Copy Fail, the Unthinkable 9-Year-Old Linux Fault that Gives Full Powers to Any User

Discovered and released this Thursday, the Linux "Copy Fail" fault (CVE-2026-31431) allows a simple local user to obtain complete root access on all major distributions since 2017, without any particular technical expertise.

3 hours ago

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winfuture.de

"Copy Fail": Zero-Day Gap Threatens Almost All Linux-Distros Since 2017

A serious security vulnerability in the Linux kernel is currently causing a stir: The vulnerability called "Copy Fail" allows local users without special rights to obtain full administrator rights (root access). (Continue reading)

5 hours ago

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Help Net Security

Nine-year-old Linux kernel flaw enables reliable local privilege escalation (CVE-2026-31431)

Security researchers have disclosed CopyFail, a local privilege escalation (LPE) vulnerability (CVE-2026-31431) in the Linux kernel.

5 hours ago

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Linux-Magazin

Copy Fail: Critical Gap in the Linux Kernel Allows Rights Expansion

A recently released critical vulnerability in the cryptographic subsystem of the Linux kernel allows full root-level rights expansion. The "Copy Fail" christened vulnerability affects almost all major distributions over the past nine years and can be exploited by a small Python script. The vulnerability under CVE-2026-31431 results from a logic error in the algif_aead module of the kernel crypto API.

6 hours ago

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securityweek.com

‘Copy Fail’ Logic Flaw in Linux Kernel Enables System Takeover

Affecting the kernel’s authencesn cryptographic template, the vulnerability was introduced in 2017 and impacts all distributions. The post ‘Copy Fail’ Logic Flaw in Linux Kernel Enables System Takeover appeared first on SecurityWeek.

6 hours ago

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