Fix Segfault in nfc_genl_dump_devices_done in Kernel
Summary
GSD-2021-1002687: nfc: fix segfault in nfc_genl_dump_devices_done. Affects Kernel versions < c602863ad28ec86794cb4ab4edea5324f555f181. 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 functionalities and acts as an interface between hardware and software. It manages system resources, facilitates communication between different software components, and ensures the overall stability and security of the system. The nfc_genl_dump_devices_done function is part of the NFC (Near Field Communication) subsystem in the Kernel, which enables communication between devices in close proximity. However, a vulnerability has been discovered in the nfc_genl_dump_devices_done function that can lead to a segmentation fault, potentially causing system instability or crashes.
Vulnerability Detail
The vulnerability in nfc_genl_dump_devices_done function can be triggered under certain conditions, resulting in a segmentation fault. This can be exploited by an attacker to crash the system or potentially execute arbitrary code with elevated privileges. The impact of this vulnerability depends on the context in which the NFC subsystem is used and the privileges of the attacker. It is important to note that the actual impact and attack plausibility have not yet been proven.
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, as a general best practice, it is advisable to follow good security hygiene, such as keeping the system up to date with the latest security patches and using appropriate access controls to limit the privileges of potential attackers.
Conclusion
The nfc_genl_dump_devices_done function in the Kernel has a vulnerability that can lead to a segmentation fault. To mitigate this issue, it is crucial to update the Linux Kernel to version v5.10.87 or later. This fix ensures that the vulnerable code is patched, reducing the risk of system instability and potential exploitation. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The Kernel is a critical component of the Linux operating system that provides core functionalities and acts as an interface between hardware and software.
NFC (Near Field Communication) is a technology that enables communication between devices in close proximity, typically within a few centimeters.
A segmentation fault, also known as a segfault, is a specific kind of error caused by accessing memory that does not belong to a program, often resulting in a crash or termination of the program.
The potential consequences of this vulnerability include system instability, crashes, and potential execution of arbitrary code with elevated privileges.
To protect your system, it is recommended to update the Linux Kernel to version v5.10.87 or later, which includes the fix for this vulnerability. Additionally, following good security practices, such as keeping the system up to date and implementing appropriate access controls, can help mitigate the risk.
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