Vulnerability in Kernel: Potential DMA Mapping Leak in mt76
Summary
UVI-2021-1000304: mt76: fix potential DMA mapping leak. Affects Kernel versions >= 27d5c528a7ca08dcd44877fdd9fc08b76630bf77, < 91b9548d413fda488ea853cd1b9f59b572db3a0c. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The Kernel is a crucial component of the Linux operating system that provides core functionality and acts as an interface between hardware and software. It manages system resources, facilitates communication between different software components, and ensures the security and stability of the system. The mt76 driver is responsible for supporting MediaTek MT76x0 and MT76x2 wireless LAN devices. These devices are commonly used in various networking applications, including routers and access points. However, a potential vulnerability has been identified in the mt76 driver that could lead to a DMA mapping leak.
Vulnerability Detail
The vulnerability in the mt76 driver involves a potential DMA mapping leak. DMA (Direct Memory Access) is a feature that allows hardware devices to directly access system memory without involving the CPU. In certain scenarios, the mt76 driver may fail to properly release DMA mappings, leading to a resource leak. This could potentially be exploited by an attacker to exhaust system resources, degrade system performance, or even execute arbitrary code. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →
Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
In conclusion, a potential vulnerability has been identified in the mt76 driver of the Kernel, which could result in a DMA mapping leak. This vulnerability can be mitigated by updating the Linux Kernel to version v5.12.4 or later. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
The Kernel is a critical component of the Linux operating system that manages system resources, facilitates communication between software components, and ensures system security and stability.
The mt76 driver is responsible for supporting MediaTek MT76x0 and MT76x2 wireless LAN devices. These devices are commonly used in networking applications such as routers and access points.
DMA (Direct Memory Access) is a feature that allows hardware devices to directly access system memory without involving the CPU. It enables efficient data transfer between devices and memory.
If exploited, this vulnerability could lead to resource leaks, system performance degradation, or even arbitrary code execution. However, the actual impact and attack plausibility have not been proven yet.
To fix this vulnerability, update the Linux Kernel to version v5.12.4 or later, which includes a commit (91b9548d413fda488ea853cd1b9f59b572db3a0c) that addresses the potential DMA mapping leak in the mt76 driver.
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
