NPD bug in sl_tx_timeout() in Kernel

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-2022-1002460: drivers: net: slip: fix NPD bug in sl_tx_timeout(). Affects Kernel versions < 113284fe48770841e157e338bf3a2e9f197a8b50. No fix is published. How to fix ↓

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Background

The Kernel is a crucial component of the Linux operating system that acts as a bridge between the hardware and software layers. It provides essential functionalities and services to enable the proper functioning of the system. The slip driver in the Kernel is responsible for handling Serial Line Internet Protocol (SLIP) connections. SLIP is a protocol used for transmitting IP packets over serial lines. However, a vulnerability has been identified in the slip driver's sl_tx_timeout() function.

Vulnerability Detail

The vulnerability in the sl_tx_timeout() function of the slip driver in the Kernel allows for a null pointer dereference (NPD) bug. This bug can be triggered when a timeout occurs during the transmission of SLIP packets. An attacker could potentially exploit this vulnerability to cause a denial-of-service (DoS) condition or execute arbitrary code with kernel privileges. 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 v4.9.311 by commit 113284fe48770841e157e338bf3a2e9f197a8b50. To fix the vulnerability, it is recommended to update the Kernel to the fixed version or apply the specific commit that addresses the issue.

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Workaround

There is no specific workaround mentioned for this vulnerability.

Conclusion

The NPD bug in the sl_tx_timeout() function of the slip driver in the Kernel poses a potential security risk. It is crucial to update the Kernel to the fixed version or apply the specific commit to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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