Memory Leak Vulnerability in MIPS Kernel
Summary
GSD-2022-1001209: MIPS: pgalloc: fix memory leak caused by pgd_free(). Affects Kernel versions >= f9cb654cb550b7b87e8608b14fc3eca432429ffe, < 1bf0d78c8cc3cf615a6e7bf33ada70b73592f0a1. No fix is published. How to fix ↓
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Background
The MIPS kernel is a component of the Linux operating system that supports the MIPS architecture. It provides essential functionality for managing memory, processes, and system resources. The kernel is responsible for handling low-level operations and ensuring the proper functioning of the system. However, a vulnerability has been discovered in the kernel that can lead to a memory leak.
Vulnerability Detail
The vulnerability in the MIPS kernel is caused by a memory leak triggered by the pgd_free() function. This function is responsible for freeing the page global directory (pgd) data structure used for memory management. However, due to a coding error, the function fails to release 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 adverse effects.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can disable the affected functionality by modifying the kernel configuration. This can be achieved by removing the relevant module or disabling the corresponding feature in the kernel configuration file. However, it is important to note that this workaround may result in the loss of certain functionality or performance degradation. Therefore, it is strongly recommended to apply the official patch as soon as possible.
Conclusion
In conclusion, a memory leak vulnerability has been identified in the MIPS kernel, which can be exploited to exhaust system memory resources. To mitigate this vulnerability, it is recommended to update the Linux kernel to version v5.17.2 or later. Users can also use the Vulert Playground to check if their system is affected. For further assistance or support in vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can lead to a memory leak, potentially causing system instability, resource exhaustion, or 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 known vulnerabilities.
No, the vulnerability was introduced in version v5.9 of the Linux kernel. Versions prior to v5.9 are not affected.
At the time of this report, no known exploits for this vulnerability have been identified. However, it is still crucial to apply the patch to mitigate any potential risks.
No, after applying the patch, a system reboot is necessary to ensure the changes take effect and the vulnerability is fully addressed.
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