Memory Leak Vulnerability in Linux Kernel
Summary
GSD-2021-1000621: net: fec: fix the potential memory leak in fec_enet_init(). Affects Kernel versions >= 59d0f746564495c7f54526674deabfcf101236a1, < 20255d41ac560397b6a07d8d87dcc5e2efc7672a. 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 essential functionality. It is widely used in various devices, including servers, desktops, and embedded systems. The vulnerability in focus is related to the Network Driver Framework (net) and specifically affects the FEC (Flexible Ethernet Controller) driver. The FEC driver is responsible for managing Ethernet communication on certain hardware platforms.
Vulnerability Detail
The vulnerability, identified as GSD-2021-1000621, exists in the fec_enet_init() function within the FEC driver. It can lead to a memory leak, potentially causing resource exhaustion and system instability. The issue was introduced in version v3.18 of the Linux Kernel and has been fixed in version v5.4.124. The vulnerability could be exploited by an attacker to exhaust system memory, leading to a denial-of-service (DoS) condition or other unpredictable behavior.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can disable the FEC driver if it is not essential for their system's operation. This can be achieved by blacklisting the 'fec' module or removing it from the kernel configuration. However, this workaround should only be considered if the FEC functionality is not required, as it may impact the system's networking capabilities.
Conclusion
The memory leak vulnerability in the Linux Kernel's FEC driver can have serious consequences, including resource exhaustion and system instability. It is crucial to update the Linux Kernel to version v5.4.124 or later to mitigate this vulnerability. Users can also consider disabling the FEC driver as a temporary workaround if it is not essential for their system's operation. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can lead to a memory leak, potentially causing resource exhaustion and system instability. It could be exploited by an attacker to trigger a denial-of-service (DoS) condition or other unpredictable behavior.
The vulnerability was introduced in version v3.18 of the Linux Kernel and fixed in version v5.4.124.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and the Vulert Playground will analyze it for potential vulnerabilities.
Yes, the vulnerability has been fixed in version v5.4.124 of the Linux Kernel. It is recommended to update to this version or a later one to mitigate the risk.
At the time of this report, there are no known public exploits targeting this specific vulnerability. However, it is always advisable to apply security patches promptly to minimize the risk of exploitation.
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