Memory Leak in drm/nouveau/debugfs in Linux Kernel
Summary
UVI-2021-1001580: drm/nouveau/debugfs: fix file release memory leak. Affects Kernel versions >= 6e9fc177399f08446293fec7607913fdbc95e191, < 11cd944bb87d9e575b94c07c952105eda745b459. No fix is published. How to fix ↓
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Background
The Linux Kernel is a widely used open-source operating system kernel that serves as the foundation for various Linux distributions. It provides essential functionality for hardware abstraction, process management, memory management, and device drivers. The drm/nouveau/debugfs component within the kernel is responsible for providing debug information and configuration options for the Nouveau graphics driver, which supports NVIDIA GPUs. This vulnerability affects the debugfs file release mechanism in the Nouveau graphics driver.
Vulnerability Detail
The vulnerability in drm/nouveau/debugfs allows an attacker to trigger a memory leak when releasing certain files. This can lead to a depletion of system memory resources over time, potentially causing performance degradation or denial of service. The issue originates from improper memory deallocation in the file release process. An attacker with local access to the system could exploit this vulnerability to exhaust available memory resources, impacting system stability and performance.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
In conclusion, the memory leak vulnerability in drm/nouveau/debugfs within the Linux Kernel can lead to system performance degradation or denial of service. It is crucial to update the kernel to version v5.4.153 or later, which includes the necessary fix. Users should follow standard procedures for kernel updates and ensure the integrity of the downloaded files. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can result in a memory leak, leading to system performance degradation or denial of service. However, the actual impact may vary depending on the system's memory capacity and workload.
Any system running the affected versions of the Linux Kernel with the Nouveau graphics driver enabled is potentially vulnerable. This includes Linux distributions utilizing the affected kernel versions.
No, this vulnerability requires local access to the system in order to exploit it.
There are no known instances of this vulnerability being exploited in the wild at the time of this report.
No, the recommended mitigation is to update the Linux Kernel to the fixed version. Applying the provided fix is the most reliable way to address the vulnerability.
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