ZDI-26-573: Linux Kernel KSMBD Response Header Out-Of-Bounds Read Information Disclosure Vulnerability

Published Aug 13, 2026

Updated

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Linux Kernel KSMBD. Authentication is not required to exploit this vulnerability. However, only systems with ksmbd enabled are vulnerable. The ZDI has assigned a CVSS rating of 9.3.

Affected Software

1 affected component

Linux kernel ksmbd

Event History

Aug 13, 2026

Advisory Published

via ZDI·05:00 AM

Data Sourced

via ZDI·05:00 AM

Description

Frequently Asked Questions

What is the severity of ZDI-26-573?

The severity of ZDI-26-573 is rated at 9.3 on the CVSS scale.

How do I fix ZDI-26-573?

To fix ZDI-26-573, disable the ksmbd service or apply the latest patch from the Linux kernel maintainers.

What impact does ZDI-26-573 have on my system?

ZDI-26-573 allows remote attackers to perform an out-of-bounds read, potentially disclosing sensitive information.

Is authentication required to exploit ZDI-26-573?

No, ZDI-26-573 can be exploited without any authentication by remote attackers.

What systems are affected by ZDI-26-573?

Only Linux systems with the ksmbd service enabled are affected by ZDI-26-573.

ZDI-26-573: Linux Kernel KSMBD Response Header Out-Of-Bounds Read Information Disclosure Vulnerability

Affected Software

Event History

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Frequently Asked Questions

What is the severity of ZDI-26-573?

How do I fix ZDI-26-573?

What impact does ZDI-26-573 have on my system?

Is authentication required to exploit ZDI-26-573?

What systems are affected by ZDI-26-573?

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Frequently Asked Questions

What is the severity of ZDI-26-573?

How do I fix ZDI-26-573?

What impact does ZDI-26-573 have on my system?

Is authentication required to exploit ZDI-26-573?

What systems are affected by ZDI-26-573?