Use-after-free vulnerability in wifi: mac80211
Summary
GSD-2022-1003559: wifi: mac80211: fix use-after-free in chanctx code. Affects Kernel versions >= 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f, < 6118bbdf69f4718b02d26bbcf2e497eb66004331. No fix is published. How to fix ↓
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Background
The wifi package, specifically the mac80211 module, is responsible for managing wireless network connections in the Linux Kernel. It provides the necessary functionality for wireless network devices and handles various operations such as channel context management. The vulnerability identified in this package is a use-after-free issue in the chanctx code.
Vulnerability Detail
The use-after-free vulnerability in the chanctx code of the wifi: mac80211 package allows an attacker to exploit a freed memory region. This can lead to a variety of potential security risks, including remote code execution, privilege escalation, or denial of service attacks. The vulnerability was introduced in version v3.17 of the Linux Kernel and has been fixed in version v5.10.121 by commit 6118bbdf69f4718b02d26bbcf2e497eb66004331.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The use-after-free vulnerability in the chanctx code of wifi: mac80211 poses a significant security risk and should be addressed promptly. It is recommended to update the Linux Kernel to version v5.10.121 or later to mitigate this vulnerability. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The use-after-free vulnerability in the chanctx code of wifi: mac80211 can potentially allow an attacker to execute arbitrary code, escalate privileges, or cause denial of service.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and the tool will analyze it for any known vulnerabilities.
At the moment, there are no known workarounds for this vulnerability. It is recommended to update the Linux Kernel to the fixed version.
There is no information available regarding exploitation of this vulnerability in the wild. However, it is always recommended to apply security patches promptly to mitigate any potential risks.
You can find more information about this vulnerability in the official Linux Kernel repository. The commit 6118bbdf69f4718b02d26bbcf2e497eb66004331 specifically addresses and fixes this issue.
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