Critical RefluXFS Flaw Exposes Millions of Linux Systems to Root Takeover
ID: b1ae012c-9368-5784-96e3-56b679565168
STIX ID: report--b1ae012c-9368-5784-96e3-56b679565168
Feed Name: ThreatCluster
Threat Score
A critical local privilege escalation vulnerability (CVE-2026-64600) in the Linux XFS filesystem reflink copy-on-write path allows local attackers to gain root and overwrite protected files persistently; the flaw affects over 16 million RHEL-derived systems, was patched on July 16, 2026, and was reported by Qualys Threat Research, with immediate patching and reboot recommended.
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