USB dwc3: ep0 NULL Pointer Exception in Linux Kernel

Kernel Updated 02 Oct 2025

Summary

30/06/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1000955: usb: dwc3: ep0: fix NULL pointer exception. Affects Kernel versions < 470403639114895e2697c766fbe17be8d0e9b67a. No fix is published. How to fix ↓

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Background

The Linux Kernel is the core component of the Linux operating system, responsible for managing system resources and providing an interface for software applications. The USB (Universal Serial Bus) subsystem in the Linux Kernel enables communication between the computer and USB devices. The dwc3 driver is used for USB 3.0 controllers. The ep0 endpoint is the control endpoint used for device initialization and configuration. A NULL pointer exception vulnerability has been identified in the dwc3 ep0 driver, which could potentially lead to system crashes or privilege escalation.

Vulnerability Detail

The vulnerability arises due to a NULL pointer exception in the dwc3 ep0 driver. When processing certain USB requests, the driver fails to handle a NULL pointer properly, leading to a system crash or potential privilege escalation. An attacker with physical access to the system or the ability to send specially crafted USB requests could exploit this vulnerability to disrupt system functionality or gain elevated privileges.

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 essential to apply the official patch or update the Linux Kernel to the fixed version.

Conclusion

The USB dwc3 ep0 NULL pointer exception vulnerability in the Linux Kernel could lead to system crashes or privilege escalation. It is crucial to update the Linux Kernel to version v5.10.44 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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