XFS

RefluXFS CVE-2026-64600: XFS Root Privilege Escalation Hits 16.4M Systems

RefluXFS CVE-2026-64600 XFS privilege escalation to root diagram showing a reflink direct-I/O race overwriting a protected file across 16.4 million Linux systems

RefluXFS CVE-2026-64600: XFS Root Privilege Escalation Hits 16.4M Systems

Do Son July 22, 2026

Qualys discloses CVE-2026-64600 (RefluXFS), an XFS privilege escalation to root affecting 16.4M+ Linux systems. Patch the kernel and reboot now.

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