Stale File Descriptors Vulnerability in drm/vmwgfx
Summary
GSD-2022-1000095: drm/vmwgfx: Fix stale file descriptors on failed usercopy. Affects Kernel versions >= c906965dee22d5e95d0651759ba107b420212a9f, < e8d092a62449dcfc73517ca43963d2b8f44d0516. No fix is published. How to fix ↓
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Background
The drm/vmwgfx package is a component of the Linux Kernel that provides support for VMware virtual graphics devices. It allows virtual machines to utilize accelerated 3D graphics capabilities. The package is responsible for managing the communication between the virtual machine and the host system's graphics hardware. However, a vulnerability has been discovered in the package that could lead to the presence of stale file descriptors in certain scenarios.
Vulnerability Detail
The vulnerability in drm/vmwgfx arises from a failure to properly handle usercopy operations. When a usercopy operation fails, the package does not correctly clean up the associated file descriptors, resulting in stale file descriptors being left behind. An attacker could potentially exploit this vulnerability to gain unauthorized access to sensitive information or escalate their privileges. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
The drm/vmwgfx package in the Linux Kernel is vulnerable to a stale file descriptors issue. This vulnerability could potentially be exploited to gain unauthorized access or escalate privileges. It is crucial to update the Linux Kernel to version v4.14.264 or later to mitigate this vulnerability. For additional support, please reach out to DevNack.com.
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FAQ
The impact of this vulnerability could potentially allow an attacker to gain unauthorized access to sensitive information or escalate their privileges.
You can use Vulert's playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Vulert uses a manifest file like package-lock.json to monitor and alert in real-time for open-source vulnerabilities.
There is no information available regarding the exploitation of this vulnerability in the wild.
The recommended mitigation is to update the Linux Kernel to version v4.14.264 or later, as this includes the fix for the vulnerability.
For further support on vulnerability remediation, you can contact info@devnack.com.
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