CVE-2026-64600: RefluXFS Linux Kernel Flaw Can Lead to Root Privilege Escalation

Key Takeaways

• CVE-2026-64600, also referred to as the RefluXFS vulnerability, is a Linux local privilege escalation flaw that can turn an ordinary user foothold into full root access. Linux local privilege escalation bugs remain especially dangerous when they turn an ordinary user foothold into full root access.
• The issue is notable because exploitation does not rely on memory corruption in the traditional sense, nor does it require bypassing modern hardening.