Kernel mt76: mt7921 Firmware Download Kernel Crash
Summary
GSD-2021-1000250: mt76: mt7921: fix kernel crash when the firmware fails to download. Affects Kernel versions >= 5c14a5f944b91371961548b1907802f74a4d2e5c, < a46b536cd60c0dbd4bf767c62a8774dec52bf099. No fix is published. How to fix ↓
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Background
The Kernel package is a crucial component of the Linux operating system. It provides the core functionality and acts as an interface between the hardware and software layers. The mt76 module within the Kernel package is responsible for managing MediaTek MT76x2 wireless LAN drivers. The mt7921 driver is specifically designed for the MT7921 Wi-Fi chipset. This vulnerability affects the mt7921 driver when the firmware fails to download properly, leading to a kernel crash.
Vulnerability Detail
The vulnerability in the mt7921 driver arises when the firmware download process encounters an error. This can occur due to various reasons, such as network issues or corrupted firmware files. When the firmware fails to download, it triggers a kernel crash, resulting in a system instability or even a complete system halt. An attacker could potentially exploit this vulnerability to cause a denial-of-service (DoS) condition or disrupt the normal operation of the affected system.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The Kernel mt76 mt7921 firmware download vulnerability can lead to a kernel crash and system instability. It is crucial to update the Linux Kernel to version v5.12.4 or later to mitigate this issue. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can lead to a kernel crash, causing system instability or a complete system halt. It may also enable attackers to launch denial-of-service attacks or disrupt the normal operation of the affected system.
The vulnerability was introduced in Linux Kernel version v5.12 and is present in all versions prior to v5.12.4.
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 to the playground, and it will provide real-time alerts for open-source vulnerabilities, including this one.
At the moment, there are no known workarounds for this vulnerability. It is recommended to update the Linux Kernel to the fixed version.
You can find more information about this vulnerability in the official GitHub repository of the Cloud Security Alliance's GSD Database: https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1000xxx/GSD-2021-1000250.json
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