Memory Leak Vulnerability in nfp_cpp_area_cache_add() in Kernel
Summary
GSD-2021-1002507: nfp: Fix memory leak in nfp_cpp_area_cache_add(). Affects Kernel versions >= 4cb584e0ee7df70fd0376aee60cf701855ea8c81, < 484069b5de9d223cc1c64c6f80389a99cfef51f1. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that provides core functionalities and manages system resources. It acts as an interface between the hardware and software layers, allowing applications to communicate with the underlying hardware. The nfp_cpp_area_cache_add() function is a part of the Kernel's nfp module, which is responsible for managing the Netronome Flow Processor (NFP) devices. These devices are used for high-performance packet processing and network acceleration. The nfp_cpp_area_cache_add() function is used to add an area to the NFP's CPP (Coherent Packet Processor) memory cache. This cache is used to store frequently accessed data for faster processing. However, a memory leak vulnerability has been identified in this function, which can lead to the exhaustion of system memory over time.
Vulnerability Detail
The memory leak vulnerability in nfp_cpp_area_cache_add() allows an attacker to cause a gradual depletion of system memory by repeatedly adding areas to the CPP memory cache without properly releasing the allocated memory. This can result in a denial of service (DoS) condition, as the system may become unresponsive or crash due to insufficient memory. The vulnerability was introduced in version v4.11 of the Linux Kernel and is fixed in version v5.10.85. 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
As a workaround, users can mitigate the risk of memory depletion by avoiding the excessive use of the nfp_cpp_area_cache_add() function. If possible, alternative methods or data structures should be considered to manage the CPP memory cache. Additionally, monitoring system memory usage and implementing resource limits can help detect and prevent memory exhaustion.
Conclusion
The memory leak vulnerability in nfp_cpp_area_cache_add() can lead to a gradual depletion of system memory, potentially causing a denial of service (DoS) condition. It is crucial to update the Linux Kernel to version v5.10.85 or later to fix this vulnerability. Regularly updating the Kernel is essential for maintaining the security and stability of the system. For further support on vulnerability remediation, you can contact DevNack.com.
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FAQ
The vulnerability can lead to a gradual depletion of system memory, potentially causing a denial of service (DoS) condition where the system becomes unresponsive or crashes due to insufficient memory.
You can use the Vulert Playground at Vulert 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 memory leak vulnerability.
At the time of this report, there is no known exploit for this vulnerability. However, it is essential to apply the recommended fix or update the Kernel to mitigate the risk of potential exploitation.
While it is highly recommended to update the Kernel to the fixed version, you can manually apply the necessary patch if you have the expertise. However, this approach may be complex and error-prone, so it is best to rely on official Kernel updates.
There may be other vulnerabilities in the nfp module that have not been disclosed or discovered yet. It is crucial to stay updated with the latest security advisories and patches from the Linux Kernel community to address any potential vulnerabilities.
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