Use-after-free vulnerability in drm/nouveau package
Summary
GSD-2021-1001689: drm/nouveau: avoid a use-after-free when BO init fails. Affects Kernel versions >= 019cbd4a4feb3aa3a917d78e7110e3011bbff6d5, < 548f2ff8ea5e0ce767ae3418d1ec5308990be87d. No fix is published. How to fix ↓
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Background
The drm/nouveau package is a component of the Linux Kernel that provides support for the NVIDIA graphics cards using the Nouveau driver. It allows users to utilize the full capabilities of their NVIDIA GPUs on Linux systems. However, a use-after-free vulnerability has been discovered in the package, which can lead to potential security risks.
Vulnerability Detail
The use-after-free vulnerability in the drm/nouveau package occurs when the initialization of a Buffer Object (BO) fails. This vulnerability was introduced in version v5.4 of the Linux Kernel and was fixed in version v5.14.12. An attacker could potentially exploit this vulnerability to execute arbitrary code or cause a denial-of-service (DoS) condition. The vulnerability arises due to improper handling of memory deallocation, leading to a use-after-free scenario.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can avoid the use of the affected functionality or disable the Nouveau driver if it is not required. However, it is strongly advised to apply the official fix by updating the Linux Kernel to ensure complete mitigation of the vulnerability.
Conclusion
The use-after-free vulnerability in the drm/nouveau package can pose significant security risks on affected systems. It is crucial to update the Linux Kernel to version v5.14.12 or later to address this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The use-after-free vulnerability in the drm/nouveau package can potentially allow an attacker to execute arbitrary code or cause a denial-of-service (DoS) condition on affected systems.
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 to the playground, and it will provide real-time alerts for any open-source vulnerabilities, including this one.
At the time of this report, there is no known public exploit for this vulnerability. However, it is crucial to apply the recommended fix to prevent any potential exploitation.
No, only versions starting from v5.4 up to v5.14.11 are affected by this use-after-free vulnerability in the drm/nouveau package. The issue has been fixed in version v5.14.12.
While a temporary workaround is available by avoiding the affected functionality or disabling the Nouveau driver, it is strongly recommended to update the Linux Kernel to the fixed version to ensure complete mitigation of the vulnerability.
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