Memory Leak in __mdiobus_register in Kernel
Summary
GSD-2021-1001962: net: mdiobus: Fix memory leak in __mdiobus_register. Affects Kernel versions < 4ec0f9abc512cc02fb04daa89ccf6697e80ab417. No fix is published. How to fix ↓
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Background
The Kernel is a crucial component of the Linux operating system that manages system resources and facilitates communication between hardware and software. It provides essential functions for device drivers, process management, memory management, and more. The __mdiobus_register function is part of the network subsystem and is responsible for registering a new MDIO bus. MDIO (Management Data Input/Output) is a protocol used for communication between Ethernet PHYs (Physical Layer transceivers) and Ethernet MACs (Media Access Controllers).
Vulnerability Detail
The vulnerability identified as GSD-2021-1001962 in the Kernel's __mdiobus_register function results in a memory leak. A memory leak occurs when memory resources are allocated but not properly deallocated, leading to a gradual depletion of available memory. In this case, the issue arises during the registration of a new MDIO bus, causing memory leaks that can potentially impact system performance and stability over time. The vulnerability has been fixed in Linux Kernel version v4.14.253 by commit 4ec0f9abc512cc02fb04daa89ccf6697e80ab417.
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.
Conclusion
The vulnerability in the __mdiobus_register function of the Kernel can result in memory leaks, potentially impacting system performance and stability. It is crucial to update the Linux Kernel to version v4.14.253 or later to address this vulnerability. For further support and assistance with vulnerability remediation, please contact DevNack.com.
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FAQ
The memory leak caused by this vulnerability can gradually deplete available memory resources, potentially leading to degraded system performance and stability.
You can use Vulert's playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and Vulert will analyze it for any open-source vulnerabilities, including this one.
As of now, there is no known exploit for this vulnerability. However, it is important to apply the recommended fix to ensure system security and stability.
This vulnerability does not have a direct remote exploitation vector. However, if an attacker gains access to the system, they may be able to leverage the memory leak to degrade system performance or potentially launch other attacks.
The recommended solution is to update the Linux Kernel to the fixed version. However, if updating the Kernel is not feasible, implementing strict resource management practices and monitoring for abnormal memory usage can help mitigate the impact of the memory leak.
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