mcb: Fix error handling in mcb_alloc_bus()

Kernel Updated 02 Oct 2025

Summary

19/10/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1001615: mcb: fix error handling in mcb_alloc_bus(). Affects Kernel versions >= 5d9e2ab9fea4cdf0a2522f5cbed2e7fbb220d757, < 7751f609eadf36b1f53712bae430019c53a16eb0. No fix is published. How to fix ↓

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Background

The mcb package is a part of the Linux Kernel ecosystem. It provides support for the Multichannel Buffered Serial Port (MCBSP) bus. The MCBSP bus is used for communication between different devices in embedded systems. The mcb_alloc_bus() function is responsible for allocating resources for the MCBSP bus. However, there is a vulnerability in the error handling of this function.

Vulnerability Detail

The vulnerability in mcb_alloc_bus() was introduced in version v4.7 of the Linux Kernel and is fixed in version v5.4.150. The vulnerability allows an attacker to exploit error conditions in the function, potentially leading to a denial-of-service (DoS) attack or other security issues. The impact and attack plausibility of this vulnerability have not been proven yet.

How To Fix

No fixed version is published for this vulnerability.

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Conclusion

The mcb package in the Linux Kernel is vulnerable to a security issue in the mcb_alloc_bus() function. To mitigate this vulnerability, it is recommended to update the Linux Kernel to version v5.4.150 or later. For further support on vulnerability remediation, you can contact DevNack.com.

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