ZDI-26-693: Linux Kernel ksmbd Share Configuration 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 ksmbd enabled are vulnerable. The ZDI has assigned a CVSS rating of 8.5.
Affected Software
1 affected component
Linux Linux kernel (ksmbd)
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 issue?
Only Linux systems with ksmbd enabled are vulnerable. Systems without ksmbd enabled are not identified as affected by the available information.
2
What does an attacker need to exploit the vulnerability?
The attacker must be able to authenticate to the affected system. The issue can then allow a remote attacker to execute arbitrary code.
3
Is this exploitable by unauthenticated remote attackers?
No. Authentication is required for exploitation according to the available advisory information.