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

Linux local privilege escalation bugs remain especially dangerous when they turn an ordinary user foothold into full root access. CVE-2026-64600, also referred to as the RefluXFS vulnerability and the RefluXFS Linux Kernel Vulnerability, is a race condition in the Linux kernel’s XFS copy-on-write path that allows an unprivileged local attacker to overwrite protected files on disk and gain host root privileges. The issue is notable because exploitation does not rely on memory…