NFC: Reorder Logic in nfc_{un,}register_device - Linux Kernel
Summary
GSD-2021-1002313: NFC: reorder the logic in nfc_{un,}register_device. Affects Kernel versions >= be055b2f89b5842f41363b5655a33dffb51a8294, < 8a9c61c3ef187d8891225f9b932390670a43a0d3. 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 NFC (Near Field Communication) subsystem in the Linux Kernel enables communication between devices in close proximity, allowing for contactless data transfer and interaction. This vulnerability specifically affects the logic in the nfc_{un,}register_device functions, which are responsible for registering and unregistering NFC devices in the system.
Vulnerability Detail
The vulnerability arises from a logic flaw in the nfc_{un,}register_device functions in the Linux Kernel. By reordering the logic in these functions, an attacker could potentially exploit the vulnerability to manipulate the registration and unregistration process of NFC devices. The impact and attack plausibility of this vulnerability have not been proven yet. However, if successfully exploited, it could lead to unauthorized access, data leakage, or denial-of-service conditions. The vulnerability was introduced in version v3.10 of the Linux Kernel and has been fixed in version v5.15.5.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability. However, users can consider implementing general security measures such as restricting access to NFC functionality, ensuring the use of trusted NFC devices, and regularly updating the Linux Kernel to the latest stable version.
Conclusion
The vulnerability in the NFC subsystem of the Linux Kernel, specifically in the nfc_{un,}register_device functions, can be mitigated by updating the kernel to version v5.15.5 or later. This update includes the necessary fix for the logic flaw. For further assistance or support in addressing this vulnerability, please contact DevNack.com.
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FAQ
The Linux Kernel is an open-source operating system kernel that provides essential functionality for various Linux distributions.
NFC (Near Field Communication) is a technology that enables contactless communication and data transfer between devices in close proximity.
The impact of this vulnerability could potentially lead to unauthorized access, data leakage, or denial-of-service conditions.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.15.5 or later.
While no specific workaround is mentioned, general security measures such as restricting access to NFC functionality and using trusted NFC devices can be considered.
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