Kernel mt76: mt7921: fix kernel crash at mt7921_pci_remove
Summary
GSD-2022-1002758: mt76: mt7921: fix kernel crash at mt7921_pci_remove. Affects Kernel versions >= 5c14a5f944b91371961548b1907802f74a4d2e5c, < 677e669973bf5460705bc65033445ea9f6615999. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that provides core functionality and interfaces with hardware devices. It is responsible for managing system resources, executing processes, and facilitating communication between software and hardware. The mt76 driver is a wireless LAN driver for MediaTek MT76x2e, MT7921e, and MT7922e chipsets. It allows these chipsets to connect to wireless networks and communicate with other devices. However, a vulnerability has been discovered in the mt7921_pci_remove function of the mt7921 driver, which can lead to a kernel crash.
Vulnerability Detail
The vulnerability in the mt7921_pci_remove function of the mt7921 driver can cause a kernel crash. This vulnerability was introduced in Linux Kernel version v5.12 by commit 5c14a5f944b91371961548b1907802f74a4d2e5c and is fixed in version v5.18.3 by commit 677e669973bf5460705bc65033445ea9f6615999. The exact impact and attack plausibility of this vulnerability have not been proven yet. However, a kernel crash can potentially lead to a denial-of-service (DoS) situation, disrupting the normal operation of the system. It is important to update to the fixed version of the Linux Kernel to mitigate this vulnerability.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The mt7921_pci_remove vulnerability in the mt7921 driver of the Linux Kernel can lead to a kernel crash, potentially causing a denial-of-service (DoS) situation. It is crucial to update the Linux Kernel to version v5.18.3 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can cause a kernel crash, potentially leading to a denial-of-service (DoS) situation.
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 Vulert Playground will analyze it for vulnerabilities, including this one.
No, there is no known workaround for this vulnerability. It is recommended to update the Linux Kernel to the fixed version.
The exact attack plausibility of this vulnerability has not been proven yet. However, if an attacker can trigger the vulnerable code path, it could potentially lead to a kernel crash remotely.
There are no known instances of this vulnerability being exploited in the wild at the time of this report.
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