Vulnerability in cifs package: NULL ptr dereference in smb2_ioctl_query_info()

Kernel Updated 02 Oct 2025

Summary

24/04/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1002126: cifs: fix NULL ptr dereference in smb2_ioctl_query_info(). Affects Kernel versions < edefc4b2a8e8310eee8e2b1714709ad5b2a93928. No fix is published. How to fix ↓

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Background

The cifs package is a component of the Linux Kernel ecosystem. It provides support for the Common Internet File System (CIFS) protocol, allowing Linux systems to access files and resources on remote Windows servers. The package is widely used in Linux distributions and is critical for enabling file sharing and network communication between Linux and Windows systems. However, a vulnerability has been discovered in the package that could lead to a NULL pointer dereference in the smb2_ioctl_query_info() function.

Vulnerability Detail

The vulnerability in the cifs package arises from a NULL pointer dereference in the smb2_ioctl_query_info() function. This function is responsible for handling IOCTL requests related to querying file information. When a specific IOCTL request is made, the function fails to properly validate a pointer, leading to a NULL pointer dereference. An attacker could exploit this vulnerability by sending a specially crafted IOCTL request, causing the function to dereference a NULL pointer and potentially resulting in a system crash or arbitrary code execution. The impact and attack plausibility of this vulnerability have not been proven yet.

How To Fix

No fixed version is published for this vulnerability.

To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.10.110 or later. The vulnerability has been addressed in the Linux Kernel commit edefc4b2a8e8310eee8e2b1714709ad5b2a93928. Updating to the latest version of the Kernel will ensure that the NULL pointer dereference issue in smb2_ioctl_query_info() is resolved.

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Conclusion

The cifs package in the Linux Kernel is vulnerable to a NULL pointer dereference issue in the smb2_ioctl_query_info() function. To mitigate this vulnerability, it is crucial to update the Linux Kernel to version v5.10.110 or later. For further support and assistance in vulnerability remediation, please contact DevNack.com.

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