The bottom line: RefluXFS vulnerability enables local privilege escalation on Linux systems with XFS filesystems through file overwriting.
A security vulnerability in the Linux kernel allows local attackers to overwrite arbitrary files on XFS volumes and gain root privileges. The vulnerability affects XFS filesystems on affected kernel versions.
A critical security vulnerability in the Linux kernel named RefluXFS affects the handling of XFS filesystems. The vulnerability allows local attackers to overwrite arbitrary files on affected XFS volumes.
By overwriting critical system files or configuration files, attackers can gain root access to the system. This is a privilege escalation vulnerability that is trivial to exploit for an attacker with local access rights.
For CISOs, this vulnerability is relevant if Linux systems with XFS filesystems are used in the infrastructure. Affected kernel versions should be identified as soon as possible and patches should be applied. The vulnerability underscores the need for regular kernel updates as part of the patch management process.
Source: www.golem.de · Published 24 July 2026
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