NULL pointer dereference crash in drm: mxsfb

Kernel Updated 02 Oct 2025

Summary

14/11/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1002183: drm: mxsfb: Fix NULL pointer dereference crash on unload. Affects Kernel versions >= ae1ed0093281939b80664a687689f12436c0e874, < 3cfc183052c3dbf8eae57b6c1685dab00ed3db4a. No fix is published. How to fix ↓

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Background

The drm (Direct Rendering Manager) subsystem in the Linux Kernel is responsible for managing graphics drivers and providing an interface between user-space applications and the underlying hardware. The mxsfb driver is specifically designed for the MXS SoC framebuffer driver. It allows for the display of graphics on devices that utilize the MXS SoC (System-on-Chip) architecture. The vulnerability in question involves a NULL pointer dereference crash that occurs during the unload process of the mxsfb driver.

Vulnerability Detail

The vulnerability arises due to a NULL pointer dereference in the mxsfb driver during the unload process. When unloading the driver, a NULL pointer is accessed, leading to a crash. An attacker with local access to the system could potentially exploit this vulnerability to cause a denial-of-service (DoS) condition, resulting in a system crash. The impact and attack plausibility of this vulnerability have not been proven yet.

How To Fix

No fixed version is published for this vulnerability.

The vulnerability has been fixed in the Linux Kernel version v5.15 by commit 3cfc183052c3dbf8eae57b6c1685dab00ed3db4a. To fix the vulnerability, users are advised to update their Linux Kernel to version v5.15 or later. This can be done by obtaining the updated kernel source code and compiling it, or by using package managers or update mechanisms provided by the Linux distribution being used.

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Workaround

No workaround has been provided for this vulnerability.

Conclusion

The NULL pointer dereference crash vulnerability in the drm: mxsfb driver has been addressed in the Linux Kernel version v5.15. Users are advised to update their kernel to the latest version to mitigate the risk of exploitation. For further support on vulnerability remediation, please contact DevNack.com.

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