Memory Leak in net: mdiobus_register
Summary
UVI-2021-1001941: net: mdiobus: Fix memory leak in __mdiobus_register. Affects Kernel versions < bc5f2f3431ced08300e4cb3aff35f1da14c26433. No fix is published. How to fix ↓
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Background
The net package in the Linux Kernel is responsible for handling network-related functionalities. It includes various components and drivers for network devices. One of these components is mdiobus, which is used for managing the Media Independent Interface (MII) buses. The MII buses are used to communicate with Ethernet PHYs (Physical Layer Transceivers) and other network devices. The mdiobus_register function is responsible for registering a mdiobus instance. However, a memory leak vulnerability has been identified in the __mdiobus_register function.
Vulnerability Detail
The vulnerability in the __mdiobus_register function of the net package can lead to a memory leak. When registering a mdiobus instance, if an error occurs during the registration process, the allocated memory for the mdiobus structure is not properly freed, resulting in a memory leak. An attacker could potentially exploit this vulnerability to exhaust system memory resources, leading to a denial-of-service condition. The impact and attack plausibility of this vulnerability have not been proven yet.
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
In conclusion, a memory leak vulnerability has been identified in the __mdiobus_register function of the net package in the Linux Kernel. Updating the Kernel to version v4.9.288 or later will fix this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The net package in the Linux Kernel is responsible for handling network-related functionalities and includes various components and drivers for network devices.
mdiobus is a component in the net package that is used for managing the Media Independent Interface (MII) buses, which are used to communicate with Ethernet PHYs and other network devices.
__mdiobus_register is a function in the net package that is responsible for registering a mdiobus instance.
A memory leak vulnerability occurs when allocated memory is not properly freed, leading to a gradual loss of available memory resources.
The impact of this vulnerability is not yet proven, but it could potentially lead to a denial-of-service condition by exhausting system memory resources.
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