Memory Leak in cfusbl_device_notify in Kernel
Summary
GSD-2021-1000730: net: caif: fix memory leak in cfusbl_device_notify. Affects Kernel versions >= 7ad65bf68d705b445ef10b77ab50dab22be185ee, < e8b37f5009ea7095529790f022859711e6939c76. 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 core system functions and provides an interface between hardware and software. It is responsible for memory management, process scheduling, device drivers, and more. The cfusbl_device_notify function in the Kernel's caif (Common API for Interfacing with the Network Subsystem) module is susceptible to a memory leak vulnerability.
Vulnerability Detail
The cfusbl_device_notify function in the caif module of the Kernel suffers from a memory leak vulnerability. This vulnerability was introduced in version v3.3 of the Kernel by commit 7ad65bf68d705b445ef10b77ab50dab22be185ee and fixed in version v4.14.236 by commit e8b37f5009ea7095529790f022859711e6939c76. When triggered, the vulnerability can lead to a continuous allocation of memory without proper deallocation, resulting in memory exhaustion and potential system instability. An attacker may be able to exploit this vulnerability to cause a denial-of-service condition or potentially execute arbitrary code.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can mitigate the risk of this vulnerability by avoiding the use of the cfusbl_device_notify function or disabling the caif module in the Kernel configuration. However, these workarounds may impact the functionality of certain applications or devices that rely on the caif module.
Conclusion
In conclusion, the cfusbl_device_notify function in the caif module of the Kernel is vulnerable to a memory leak issue. This vulnerability can lead to memory exhaustion and potential system instability, allowing attackers to cause a denial-of-service condition or potentially execute arbitrary code. It is crucial to update the Kernel to the latest version to mitigate this vulnerability. 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 manages core system functions and provides an interface between hardware and software.
The caif (Common API for Interfacing with the Network Subsystem) module is a part of the Kernel that provides a standardized interface for communication between network subsystems and user-space applications.
A memory leak vulnerability occurs when a program or system continuously allocates memory without properly deallocating it. This can lead to memory exhaustion and potential system instability.
An attacker may be able to exploit this vulnerability by triggering the cfusbl_device_notify function in the caif module, causing a continuous allocation of memory without proper deallocation. This can result in memory exhaustion and potential system instability, allowing the attacker to cause a denial-of-service condition or potentially execute arbitrary code.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v4.14.236 or later. This can be done by obtaining the latest stable version of the Kernel from the official Git repository and following the installation instructions provided.
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