Vulnerability in mxser package: xmit_buf leak in activate when LSR == 0xff

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-2022-1001822: mxser: fix xmit_buf leak in activate when LSR == 0xff. Affects Kernel versions >= 6769140d304731f0a3b177470a2adb4bacd9036b, < b125b08dbee3611f03f53b71471813ed4ccafcdd. No fix is published. How to fix ↓

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Background

The mxser package is a component of the Linux Kernel, which is responsible for managing serial ports. It provides functionality for serial communication and control. The vulnerability in question affects the activate function of mxser when the Line Status Register (LSR) is equal to 0xff. This vulnerability was introduced in version v2.6.33 of the Linux Kernel and has been fixed in version v5.15.33.

Vulnerability Detail

The vulnerability occurs due to a xmit_buf leak in the activate function of mxser when the LSR is set to 0xff. This can lead to a potential security issue, although the actual impact and attack plausibility have not been proven. Further technical details and potential ramifications of this vulnerability are available in the references link provided.

How To Fix

No fixed version is published for this vulnerability.

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Workaround

No specific workaround has been mentioned for this vulnerability.

Conclusion

In conclusion, the mxser package in the Linux Kernel is vulnerable to a xmit_buf leak in the activate function when the LSR is set to 0xff. It is recommended to update the Kernel to version v5.15.33 or later to fix this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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