importantSYS.SOURCE: The Hacker News• 2026-07-23T13:34:35+05:30

Nine-Year-Old XFS Reflink Vulnerability Allows Local Privilege Escalation in RHEL

#vulnerability #linux #rhel #ai #security

A nine-year-old vulnerability in the XFS filesystem's reflink feature allows local users to escalate privileges to root on default Red Hat Enterprise Linux (RHEL) installations. The flaw, tracked as CVE-2026-64600, was disclosed on July 22, 2026, and patches are now available for affected systems.

RefluXFS, a new Linux kernel flaw disclosed on July 22 and tracked as CVE-2026-64600, lets an unprivileged local user overwrite root-owned files on an XFS filesystem and gain persistent root access.

Qualys said default installations of Red Hat Enterprise Linux and its derivatives, Fedora Server, and Amazon Linux can meet the conditions for exploitation.

The company demonstrated the race

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