mac80211: Fix Deadlock in AP/VLAN Handling in Kernel
Summary
UVI-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 is a subsystem in the Linux Kernel that provides the implementation of the IEEE 802.11 wireless networking standard. It is responsible for managing wireless network interfaces, including access points (APs) and virtual LANs (VLANs). The vulnerability in mac80211 affects the handling of APs and VLANs, leading to a potential deadlock situation.
Vulnerability Detail
The vulnerability in mac80211 arises from a deadlock condition that can occur during the handling of APs and VLANs. When certain operations are performed on these network entities, a deadlock can be triggered, causing the system to become unresponsive. This vulnerability could be exploited by an attacker to disrupt network connectivity or potentially execute arbitrary code in the context of the kernel.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can avoid triggering the deadlock condition by refraining from performing the specific operations that lead to the issue. However, this may not be a feasible solution for all scenarios, and it is strongly advised to apply the official fix by updating the Linux Kernel.
Conclusion
The vulnerability in mac80211 that causes a deadlock in AP/VLAN handling can be mitigated by updating the Linux Kernel to version v5.12.13 or later. It is crucial to apply the official fix to ensure the system's security and stability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
mac80211 is a subsystem in the Linux Kernel that handles the implementation of the IEEE 802.11 wireless networking standard.
The vulnerability can result in a deadlock situation, causing the system to become unresponsive. It could be exploited to disrupt network connectivity or potentially execute arbitrary code in the kernel's context.
To fix this vulnerability, update the Linux Kernel to version v5.12.13 or later, which includes the necessary fix for this issue.
A workaround is to avoid triggering the specific operations that lead to the deadlock condition. However, it is recommended to apply the official fix by updating the Linux Kernel.
For more information about this vulnerability, refer to the provided references link in the vulnerability details section.
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