NFC: Race Condition Vulnerability in Linux Kernel
Summary
GSD-2021-1002280: NFC: add NCI_UNREG flag to eliminate the race. Affects Kernel versions >= 6a2968aaf50c7a22fced77a5e24aa636281efca8, < 34e54703fb0fdbfc0a3cfc065d71e9a8353d3ac9. 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 the system, including device drivers, process management, memory management, and file system support. The NFC (Near Field Communication) subsystem in the Linux Kernel enables communication between devices in close proximity, facilitating contactless data exchange. However, a race condition vulnerability has been identified in the NFC subsystem, which could potentially be exploited by attackers.
Vulnerability Detail
The race condition vulnerability in the NFC subsystem arises due to a missing flag, NCI_UNREG, which can lead to a race condition during the unregistration process. This vulnerability allows an attacker to manipulate the state of the system and potentially execute arbitrary code or disrupt the normal operation of the NFC subsystem. The impact and attack plausibility of this vulnerability have not been proven yet, but it poses a potential security risk.
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. It is advised to update the Linux Kernel to the latest version as soon as possible.
Conclusion
The race condition vulnerability in the NFC subsystem of the Linux Kernel poses a potential security risk. It is crucial to update the kernel to the latest version to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The Linux Kernel is the core component of the Linux operating system. It provides essential functionality and acts as an interface between the hardware and software layers of the system.
The NFC subsystem in the Linux Kernel enables communication between devices in close proximity using Near Field Communication technology. It facilitates contactless data exchange.
A race condition vulnerability occurs when multiple processes or threads access shared resources concurrently, leading to unexpected and potentially harmful behavior. In this case, the missing NCI_UNREG flag in the NFC subsystem can result in a race condition during the unregistration process.
If exploited, this vulnerability could allow an attacker to manipulate the state of the system and potentially execute arbitrary code or disrupt the normal operation of the NFC subsystem. However, the actual impact and attack plausibility have not been proven yet.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.10.82 or later. This update includes the necessary fix for the race condition vulnerability in the NFC subsystem.
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