llc: only change llc->dev when bind() succeeds

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-2022-1002515: llc: only change llc->dev when bind() succeeds. Affects Kernel versions >= 0a7aad979bfb43c4a78d33a5f356caf4ceb28bca, < e82b631e22920bffbd7e4a15c14a823d36d45233. No fix is published. How to fix ↓

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Background

The 'llc' package is a component of the Linux Kernel, which is responsible for managing the Logical Link Control (LLC) layer of network communication. The LLC layer handles the flow control and error recovery between two devices connected over a network. This vulnerability specifically affects the 'llc' module within the Linux Kernel.

Vulnerability Detail

The vulnerability arises from a flaw in the 'llc' module's handling of the 'bind()' function. The module incorrectly changes the 'llc->dev' attribute even when the 'bind()' operation fails. This can lead to unexpected behavior and potential security issues. An attacker could potentially exploit this vulnerability to manipulate network traffic or cause a denial-of-service (DoS) condition.

How To Fix

No fixed version is published for this vulnerability.

To fix this vulnerability, it is recommended to update the Linux Kernel to version v4.9.309 or later. This fix is implemented in commit 'e82b631e22920bffbd7e4a15c14a823d36d45233'. Updating the Kernel will ensure that the 'llc' module correctly handles the 'bind()' function and avoids the vulnerability.

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Workaround

There is no specific workaround mentioned for this vulnerability. It is advised to apply the fix by updating the Linux Kernel to the recommended version.

Conclusion

In conclusion, the 'llc' package in the Linux Kernel is vulnerable to a flaw in its handling of the 'bind()' function. This vulnerability can have serious security implications and should be addressed by updating the Linux Kernel to the recommended version. For further support and assistance in vulnerability remediation, you can contact DevNack.com.

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