Memory Leak Vulnerability in MIPS Kernel
Summary
GSD-2022-1001525: MIPS: pgalloc: fix memory leak caused by pgd_free(). Affects Kernel versions >= f9cb654cb550b7b87e8608b14fc3eca432429ffe, < 5a8501d34b261906e4c76ec9da679f2cb4d309ed. No fix is published. How to fix ↓
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Background
The MIPS kernel is a component of the Linux operating system that is specifically designed for MIPS-based processors. It provides essential functionality for managing memory, processes, and system resources. The kernel is responsible for handling low-level operations and ensuring the stability and security of the system. However, a vulnerability has been discovered in the kernel's page allocation mechanism, which can lead to memory leaks.
Vulnerability Detail
The vulnerability in the MIPS kernel is caused by a memory leak that occurs when the pgd_free() function is called. This function is responsible for freeing the memory allocated for a page global directory (pgd) structure. However, due to a coding error, the function fails to release all the allocated memory, resulting in a memory leak. An attacker could potentially exploit this vulnerability to exhaust system memory resources, leading to a denial-of-service condition or other unpredictable behavior. The vulnerability was introduced in version v5.9 of the Linux kernel and has been fixed in version v5.16.19.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is essential to apply the patch provided in the updated version of the Linux kernel to mitigate the risk of memory leaks.
Conclusion
The memory leak vulnerability in the MIPS kernel can have severe consequences, including system instability and resource exhaustion. It is crucial to update the Linux kernel to version v5.16.19 or later to mitigate this vulnerability. Additionally, it is recommended to regularly monitor and update your system's software components to ensure the overall security and stability of your environment.
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FAQ
The vulnerability can lead to memory leaks, which can result in system instability, resource exhaustion, and potential denial-of-service conditions.
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 in the MIPS kernel.
At the time of this report, there are no known exploits for this vulnerability. However, it is crucial to apply the necessary updates to prevent any potential exploitation.
No, this vulnerability does not have a remote exploit vector. An attacker would need local access to the system to exploit the memory leak vulnerability.
For further support and assistance with vulnerability remediation, you can contact info@devnack.com. Our team of experts can provide guidance and help ensure the security of your system.
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