Use-after-free vulnerability in wifi: mac80211
Summary
GSD-2022-1003992: wifi: mac80211: fix use-after-free in chanctx code. Affects Kernel versions >= 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f, < 4ba81e794f0fad6234f644c2da1ae14d5b95e1c4. No fix is published. How to fix ↓
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Background
The wifi: mac80211 package is a component of the Linux Kernel that provides the implementation of the IEEE 802.11 wireless networking stack. It is responsible for managing wireless network interfaces and handling communication between the kernel and wireless devices. The package is widely used in Linux-based systems to enable wireless connectivity.
Vulnerability Detail
The use-after-free vulnerability in the chanctx code of wifi: mac80211 allows an attacker to exploit a freed memory region. This can lead to a variety of security issues, including remote code execution, privilege escalation, or denial of service. The vulnerability was introduced in version v3.17 of the Linux Kernel and was fixed in version v4.14.283. The specific commit that addressed the vulnerability is 4ba81e794f0fad6234f644c2da1ae14d5b95e1c4.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is essential to apply the fix by updating the Linux Kernel.
Conclusion
The use-after-free vulnerability in wifi: mac80211 poses a significant security risk to Linux-based systems with wireless networking capabilities. It is crucial to update the Linux Kernel to the fixed version or apply the specific commit to mitigate the vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The use-after-free vulnerability in wifi: mac80211 can potentially allow an attacker to execute arbitrary code, escalate privileges, or cause a denial of service.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and the playground will analyze it for any known vulnerabilities.
At the time of this report, there is no known public exploit for this vulnerability. However, it is crucial to apply the fix as soon as possible to mitigate any potential risks.
Yes, this vulnerability can be exploited remotely if the affected system is connected to a network.
The only effective mitigation for this vulnerability is to update the Linux Kernel to the fixed version or apply the specific commit that addresses the issue.
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