Une faille du noyau Linux permet aux utilisateurs non privilégiés d'obtenir un accès root

Les chercheurs de Qualys ont identifié une faille logique dans le noyau Linux qui permet aux utilisateurs locaux non privilégiés de divulguer des fichiers sensibles et d'exécuter des commandes arbitraires en tant qu'utilisateur root.

La vulnérabilité affecte les installations par défaut de plusieurs distributions Linux majeures. La Threat Research Unit de Qualys a découvert le problème et l'a détaillé dans un article de blog publié vendredi.

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Illustration depicting the Linux CopyFail vulnerability enabling root access exploits alongside Ubuntu's DDoS-induced outage.
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Linux CopyFail exploit threatens root access amid Ubuntu outage

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A critical Linux vulnerability known as CopyFail, tracked as CVE-2026-31431, allows attackers to gain root access on systems running kernels since 2017. Publicly released exploit code has heightened risks for data centers and personal devices. Ubuntu's infrastructure has been offline for over a day due to a DDoS attack, hampering security communications.

A security researcher has disclosed Dirty Frag, a new Linux kernel exploit that allows local users to gain root privileges. The flaw affects major distributions and remains unpatched on most systems despite earlier fixes for a similar issue.

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Greg Kroah-Hartman, maintainer of the Linux kernel, stated that AI-driven code review tools have become genuinely useful. He told The Register that the technology reached an inflection point about a month ago, leading to actionable bug reports.

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