Null Pointer Dereference in video: fbdev: smscufx

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-2022-1002265: video: fbdev: smscufx: Fix null-ptr-deref in ufx_usb_probe(). Affects Kernel versions >= 3c8a63e22a0802fd56380f6ab305b419f18eb6f5, < da8b269cc0a2526ebeaccbe2484c999eb0f822cf. No fix is published. How to fix ↓

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Background

The video: fbdev: smscufx package is a component of the Linux Kernel, which is responsible for handling video frame buffer devices. It provides support for various video display hardware, allowing applications to interact with the framebuffer and display graphics on the screen. The smscufx driver specifically deals with the SMSC UFX USB DisplayLink devices, enabling them to function as frame buffer devices. However, a vulnerability has been discovered in the ufx_usb_probe() function of the smscufx driver, leading to a null pointer dereference.

Vulnerability Detail

The null pointer dereference vulnerability in the ufx_usb_probe() function of the smscufx driver can be exploited by an attacker to cause a denial of service (system crash) or potentially execute arbitrary code with kernel privileges. This vulnerability occurs when the driver fails to handle a null pointer properly, resulting in a crash or potential code execution when certain USB devices are connected. An attacker with physical access to a vulnerable system or the ability to load a malicious USB device driver could exploit this vulnerability.

How To Fix

No fixed version is published for this vulnerability.

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Workaround

There is no known workaround for this vulnerability. It is recommended to apply the fix by updating the Linux Kernel to the latest stable version.

Conclusion

The null pointer dereference vulnerability in the video: fbdev: smscufx package of the Linux Kernel can result in a denial of service or potential code execution. It is crucial to update the Linux Kernel to the latest stable version to mitigate this vulnerability. For further assistance or support in vulnerability remediation, please contact DevNack.com.

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