Memory Leak in drm/nouveau/debugfs in Linux Kernel
Summary
GSD-2021-1001504: drm/nouveau/debugfs: fix file release memory leak. Affects Kernel versions >= 6e9fc177399f08446293fec7607913fdbc95e191, < df0c9418923679bc6d0060bdb1b5bf2c755159e0. 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 communication between hardware and software. The drm/nouveau/debugfs module is a part of the kernel's Direct Rendering Manager (DRM) subsystem, specifically designed for the Nouveau graphics driver. The debugfs filesystem provides a mechanism for exposing debugging and diagnostic information to userspace. However, a vulnerability has been identified in the drm/nouveau/debugfs module that can lead to a memory leak.
Vulnerability Detail
The vulnerability in drm/nouveau/debugfs is caused by a memory leak that occurs when a file is released. This can result in the consumption of excessive memory resources over time, leading to performance degradation or even system instability. An attacker may be able to exploit this vulnerability to exhaust system memory, causing a denial-of-service condition. The vulnerability was introduced in version v4.5 of the Linux Kernel and has been fixed in version v4.9.287.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can disable the debugfs filesystem by adding the following line to the kernel command line during boot: 'debugfs=none'. This will prevent the vulnerable functionality from being accessible, but it may also disable other legitimate uses of the debugfs filesystem. Therefore, it is recommended to apply the official fix as soon as possible.
Conclusion
In conclusion, a memory leak vulnerability has been discovered in the drm/nouveau/debugfs module of the Linux Kernel. This vulnerability can lead to performance degradation, system instability, and potential denial-of-service attacks. It is recommended to update the Linux Kernel to version v4.9.287 or later to fix this vulnerability. Alternatively, users can apply a temporary workaround by disabling the debugfs filesystem. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
This vulnerability can lead to a memory leak, potentially causing performance degradation or system instability. It may also be possible for an attacker to exploit this vulnerability to launch a denial-of-service attack by exhausting system memory.
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 Vulert will analyze it for any known vulnerabilities, including this one.
Yes, a patch for this vulnerability is available in version v4.9.287 of the Linux Kernel. It is recommended to update to this version or a later one to fix the vulnerability.
Yes, as a temporary workaround, you can disable the debugfs filesystem by adding 'debugfs=none' to the kernel command line during boot. However, it is recommended to apply the official fix as soon as possible.
You can find more information about this vulnerability in the vulnerability database maintained by the Cloud Security Alliance. The specific vulnerability ID is GSD-2021-1001504.
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