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Critical XFS Race Condition Enables Linux Privilege Escalation to Root

Cyber Press
Cyber Press
Published July 23, 2026Original Report

Excerpt

A newly disclosed CVE-2026-64600, dubbed “RefluXFS,” a critical race condition in the Linux kernel’s XFS filesystem that allows unprivileged local users to escalate to full root privileges. The flaw affects any Linux distribution shipping an XFS root filesystem with reflink enabled, including default installations of RHEL, Oracle Linux, Amazon Linux, and Fedora. Qualys estimates over 16.4 million systems worldwide are potentially exposed. RefluXFS lives in…

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Indicators of Compromise

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1 indicators

TypeIndicatorConfidenceScoreFirst Seen
CVECVE-2026-64600HighScore 61/100First seen

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