Vulnerability in mt76 DMA Initialization in Linux Kernel
Summary
GSD-2022-1002013: mt76: dma: initialize skip_unmap in mt76_dma_rx_fill. Affects Kernel versions < 9a56e2b271bc65116d1e44454b244b18d289a26b. No fix is published. How to fix ↓
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Background
The Linux Kernel is a widely used open-source operating system kernel that serves as the foundation for various Linux distributions. It provides essential functionality for hardware abstraction, process management, memory management, and device drivers. The mt76 module within the Kernel is responsible for supporting MediaTek MT76x0 and MT76x2 wireless LAN devices. These devices are commonly found in Wi-Fi routers, access points, and other networking equipment.
Vulnerability Detail
The vulnerability identified as GSD-2022-1002013 affects the mt76 module's DMA (Direct Memory Access) functionality. Specifically, the 'skip_unmap' variable in the 'mt76_dma_rx_fill' function is not properly initialized, potentially leading to uninitialized memory access or other memory-related issues. An attacker could exploit this vulnerability to execute arbitrary code, escalate privileges, or cause a denial-of-service condition. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No specific workaround has been provided for this vulnerability.
Conclusion
The vulnerability in mt76 DMA initialization in the Linux Kernel poses potential security risks, including arbitrary code execution, privilege escalation, or denial-of-service attacks. It is crucial to update the Linux Kernel to a version that includes the fix to mitigate these risks. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The impact of this vulnerability could potentially allow an attacker to execute arbitrary code, escalate privileges, or cause a denial-of-service condition.
You can use Vulert's playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file, and Vulert will analyze it for any open-source vulnerabilities, including this one.
As of now, there is no known exploit for this vulnerability. However, it is crucial to apply the necessary updates to mitigate the risk.
The specific prerequisites for exploiting this vulnerability have not been disclosed. However, it is always recommended to keep your system up to date with the latest security patches.
For more details about this vulnerability, including its technical aspects and the fix implemented in the Linux Kernel, you can refer to the source link provided in the vulnerability details section.
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