net: tun: avoid disabling NAPI twice in Kernel

Kernel Updated 02 Oct 2025

Summary

31/07/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1004812: net: tun: avoid disabling NAPI twice. Affects Kernel versions >= e90525753e3cf0566ac4917ae98785ff478ede0c, < a12fae7621434d0360202156e13969874e002661. No fix is published. How to fix ↓

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Background

The Kernel is a critical component of the Linux operating system that manages system resources and provides an interface for applications to interact with the hardware. It is responsible for tasks such as process management, memory management, and device drivers. The vulnerability in the Kernel's tun module allows for the double disabling of NAPI (New API) in certain scenarios.

Vulnerability Detail

The vulnerability arises from a code implementation issue in the tun module of the Kernel. When specific conditions are met, NAPI, a feature that improves network performance by reducing CPU usage, can be disabled twice. This redundancy can lead to decreased network performance and potential resource exhaustion. 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

No specific workaround has been provided for this vulnerability.

Conclusion

The vulnerability in the Kernel's tun module that allows for the double disabling of NAPI can lead to decreased network performance and potential resource exhaustion. It is recommended to update the Kernel to the fixed version or a later release to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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