Memory Leak Vulnerability in Linux Kernel
Summary
GSD-2021-1000648: net: fec: fix the potential memory leak in fec_enet_init(). Affects Kernel versions >= 59d0f746564495c7f54526674deabfcf101236a1, < 15102886bc8f5f29daaadf2d925591d564c17e9f. No fix is published. How to fix ↓
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Background
The Linux Kernel is the core component of the Linux operating system, responsible for managing system resources and providing an interface for applications to interact with the hardware. It is widely used in various devices, including servers, desktops, and embedded systems. The vulnerability identified in this report affects the Kernel's network subsystem, specifically the fec (Freescale Ethernet Controller) driver. The fec driver is responsible for managing Ethernet communication on Freescale/NXP platforms. This vulnerability can lead to a memory leak in the fec_enet_init() function, potentially causing resource exhaustion and system instability.
Vulnerability Detail
The vulnerability originates from a memory leak in the fec_enet_init() function of the fec driver. When initializing the fec driver, if an error occurs during the allocation of resources, such as memory, the function fails to release the previously allocated resources, resulting in a memory leak. An attacker could potentially exploit this vulnerability by repeatedly triggering the initialization process, leading to resource exhaustion and denial of service. The impact of this vulnerability depends on the specific system and its usage patterns. However, in worst-case scenarios, it could result in system crashes or instability.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can avoid the potential memory leak by avoiding scenarios that trigger the initialization of the fec driver. This may involve disabling or limiting the usage of the affected network interface or avoiding specific operations that trigger the initialization process. However, it is important to note that workarounds may not provide a complete solution and updating to the fixed version of the Kernel is highly recommended.
Conclusion
In conclusion, a memory leak vulnerability has been identified in the Linux Kernel's fec driver, specifically in the fec_enet_init() function. This vulnerability can lead to resource exhaustion and system instability. Users are advised to update their Linux Kernel to version v4.19.193 or later to mitigate this issue. Workarounds may provide temporary relief but are not a substitute for the official fix. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The Linux Kernel is the core component of the Linux operating system, responsible for managing system resources and providing an interface for applications to interact with the hardware.
The fec driver is a network driver in the Linux Kernel that manages Ethernet communication on Freescale/NXP platforms.
A memory leak occurs when a program or system fails to release allocated memory after it is no longer needed. This can lead to a gradual depletion of available memory, potentially causing performance degradation or system instability.
The potential consequences of this vulnerability include resource exhaustion, system crashes, and instability. However, the impact may vary depending on the specific system and its usage patterns.
To mitigate this vulnerability, it is recommended to update the Linux Kernel to version v4.19.193 or later, which includes the fix for this issue. Additionally, following security best practices, such as regularly updating software and implementing proper access controls, can help reduce the risk of exploitation.
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