ZDI-26-695: Linux Kernel NFSv4 Server Race Condition Remote Code Execution Vulnerability
Published Sep 14, 2026
·Updated
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Linux Kernel. Authentication is required to exploit this vulnerability. Furthermore, only systems with nfsd enabled are vulnerable. The ZDI has assigned a CVSS rating of 8.5. The following CVEs are assigned: CVE-2026-89688.
Affected Software
1 affected component
Linux Linux kernel
Event History
Sep 14, 2026
Advisory Published
via ZDI·05:00 AM
Data Sourced
via ZDI·05:00 AM
Description
Frequently Asked Questions
1
Which systems are exposed to this vulnerability?
Only Linux systems with the NFS server daemon (nfsd) enabled are vulnerable. Systems without nfsd enabled are not affected according to the advisory.
2
What does an attacker need to exploit it?
An attacker must be able to authenticate to the affected system. The vulnerability can then allow remote execution of arbitrary code.