Vulnerability in Kernel: net: dsa: felix: don't use devres for mdiobus
Summary
GSD-2022-1000372: net: dsa: felix: don't use devres for mdiobus. Affects Kernel versions >= ac3a68d56651c3dad2c12c7afce065fe15267f44, < 95e5402f9430b3c7d885dd3ec4c8c02c17936923. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that manages system resources and facilitates communication between hardware and software. It provides essential functions for the proper functioning of the system. The specific vulnerability affects the net subsystem, more specifically the dsa (Distributed Switch Architecture) module, and the felix driver. The mdiobus (Management Data Input/Output Bus) is a bus used for communication between Ethernet PHYs (Physical Layer) and Ethernet MACs (Media Access Control). The vulnerability arises from the improper use of devres (Device Resource) for mdiobus, which can lead to security issues.
Vulnerability Detail
The vulnerability in the Kernel's net subsystem, specifically in the dsa felix driver, arises from the incorrect usage of devres for mdiobus. This vulnerability can potentially be exploited by an attacker to gain unauthorized access or perform other malicious activities. The impact and attack plausibility of this vulnerability have not been proven yet. The vulnerability was introduced in version v5.9 of the Linux Kernel and has been fixed in version v5.10.101 by commit 95e5402f9430b3c7d885dd3ec4c8c02c17936923.
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. The recommended approach is to update the Kernel to the fixed version.
Conclusion
The vulnerability in the Kernel's net subsystem, specifically in the dsa felix driver, can be mitigated by updating the Linux Kernel to version v5.10.101 or later. Regularly updating the Kernel is essential to ensure the latest security patches are applied. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The Kernel is a critical component of the Linux operating system that manages system resources and facilitates communication between hardware and software.
The net subsystem in the Kernel is responsible for network-related functionality, including network protocols, device drivers, and network stack.
dsa (Distributed Switch Architecture) is a module in the Kernel that enables the implementation of distributed Ethernet switches.
mdiobus (Management Data Input/Output Bus) is a bus used for communication between Ethernet PHYs (Physical Layer) and Ethernet MACs (Media Access Control).
To update the Linux Kernel, you can follow the official documentation provided by your Linux distribution or refer to the Kernel's official website for instructions.
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