ax25: Fix NULL pointer dereferences in ax25 timers

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-2022-1002235: ax25: Fix NULL pointer dereferences in ax25 timers. Affects Kernel versions >= d2be5b563ef391f684592a28440067f4fa3735f4, < 40cb8b3b19c087a4e20f6740701e53fefbe19a7b. No fix is published. How to fix ↓

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Background

The ax25 package is a component of the Linux Kernel, which is responsible for implementing the AX.25 protocol. AX.25 is a data link layer protocol used by amateur radio operators to establish connections over radio frequencies. The ax25 package provides the necessary functionality for handling AX.25 connections and managing timers related to these connections.

Vulnerability Detail

The vulnerability in the ax25 package involves NULL pointer dereferences in ax25 timers. This means that under certain conditions, the code may attempt to access memory using a NULL pointer, leading to a crash or potential code execution. The vulnerability was introduced in version v5.4.190 of the Linux Kernel by commit d2be5b563ef391f684592a28440067f4fa3735f4 and was fixed in version v5.4.190 by commit 40cb8b3b19c087a4e20f6740701e53fefbe19a7b. 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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Workaround

There is no specific workaround mentioned for this vulnerability.

Conclusion

The ax25 package in the Linux Kernel is vulnerable to NULL pointer dereferences in ax25 timers. To mitigate this vulnerability, it is recommended to update the Linux Kernel to version v5.4.190 or later. For further support on vulnerability remediation, please contact DevNack.com.

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