Vulnerability in drm/amd/display Package: Add Affected CRTCs to Atomic State for DSC MST Unplug
Summary
GSD-2022-1001544: drm/amd/display: Add affected crtcs to atomic state for dsc mst unplug. Affects Kernel versions >= 44be939ff7ac5858f0dbd8a2a4af1fe198e14db1, < e9bbd9504bfaf70d8a299fc243931b93ae9fc933. No fix is published. How to fix ↓
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Background
The drm/amd/display package is a component of the Linux Kernel that handles the display functionality for AMD graphics cards. It provides the necessary drivers and interfaces for managing the display output, including features like Display Stream Compression (DSC) and Multi-Stream Transport (MST). These features enable efficient data compression and multi-monitor setups, respectively. However, a vulnerability has been discovered in the package that could potentially lead to security issues.
Vulnerability Detail
The vulnerability in the drm/amd/display package involves the handling of DSC MST unplug events. When a DSC MST unplug event occurs, the affected CRTCs (CRTC stands for Cathode Ray Tube Controller and represents a display controller) are not properly added to the atomic state. This omission could result in inconsistent display configurations and potential security risks. An attacker may exploit this vulnerability to manipulate the display output or gain unauthorized access to sensitive information.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can disable the DSC MST feature if it is not essential for their display setup. This can be done by modifying the kernel configuration or disabling the feature through the display settings. However, this workaround may result in a loss of functionality or reduced display performance.
Conclusion
The vulnerability in the drm/amd/display package poses a potential security risk due to the mishandling of DSC MST unplug events. It is crucial to update the Linux Kernel to the recommended version or apply the provided workaround to mitigate the risk. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The drm/amd/display package is a component of the Linux Kernel that handles the display functionality for AMD graphics cards.
DSC MST stands for Display Stream Compression Multi-Stream Transport. It enables efficient data compression and multi-monitor setups.
This vulnerability can lead to inconsistent display configurations and potential security risks. Attackers may exploit it to manipulate display output or gain unauthorized access to sensitive information.
To fix this vulnerability, update the Linux Kernel to version v5.16.19 or later.
Yes, users can disable the DSC MST feature if it is not essential for their display setup.
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