mac80211: Fix Deadlock in AP/VLAN Handling

Kernel Updated 02 Oct 2025

Summary

30/06/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1001085: mac80211: fix deadlock in AP/VLAN handling. Affects Kernel versions >= a05829a7222e9d10c416dd2dbbf3929fe6646b89, < 8043903fcb72f545c52e3ec74d6fd82ef79ce7c5. No fix is published. How to fix ↓

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Background

The mac80211 package is a subsystem in the Linux Kernel that provides support for wireless LAN devices. It handles the management of Access Points (APs) and Virtual LANs (VLANs). The AP functionality allows devices to connect to a wireless network, while VLANs enable the segmentation of a network into multiple virtual networks. This vulnerability affects the mac80211 package and specifically impacts the handling of APs and VLANs.

Vulnerability Detail

The vulnerability in mac80211 involves a deadlock that can occur during the handling of APs and VLANs. A deadlock is a situation where two or more threads are blocked indefinitely, waiting for each other to release resources. In this case, the deadlock can be triggered by certain scenarios related to AP and VLAN management, potentially leading to a system freeze or unresponsiveness. 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 mac80211 package in the Linux Kernel has been found to have a vulnerability related to the handling of APs and VLANs. This vulnerability has been fixed in the latest version of the kernel. It is recommended to update the kernel to ensure the security of the system. For further support on vulnerability remediation, you can contact DevNack.com.

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