Vulnerability in Kernel Package: drm/plane
Summary
GSD-2022-1003788: drm/plane: Move range check for format_count earlier. Affects Kernel versions < 1e29d829ad51d1472dd035487953a6724b56fc33. No fix is published. How to fix ↓
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Background
The Kernel package is an essential component of the Linux operating system, responsible for managing the system's core functionality. It includes various subsystems, such as the Direct Rendering Manager (drm), which handles graphics-related tasks. The drm/plane subsystem specifically deals with managing display planes, which are used to compose and present graphical content on a screen. This vulnerability in the drm/plane subsystem could potentially be exploited to execute arbitrary code or cause a denial of service.
Vulnerability Detail
The vulnerability in the drm/plane subsystem arises from a range check for the 'format_count' parameter being performed too late in the code execution flow. This could allow an attacker to provide a malicious value for 'format_count', leading to buffer overflows, memory corruption, or other security issues. The impact of this vulnerability could range from privilege escalation to system crashes or even remote code execution. It is important to note that the actual impact and attack plausibility have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can apply the patch provided in commit 1e29d829ad51d1472dd035487953a6724b56fc33 manually to their Linux Kernel installation. The patch modifies the code to move the range check for 'format_count' to an earlier stage, preventing potential exploitation. Here is an example of the modified code:
// Original code
...
if (format_count > MAX_FORMATS)
return -EINVAL;
...
// Patched code
...
if (format_count > MAX_FORMATS || format_count < 0)
return -EINVAL;
...
Conclusion
In conclusion, the vulnerability in the drm/plane subsystem of the Kernel package poses a potential security risk, allowing for arbitrary code execution or denial of service. It is crucial to update the Linux Kernel to the recommended version or apply the provided patch to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The Kernel package is a crucial component of the Linux operating system, responsible for managing core system functionality.
The drm/plane subsystem is part of the Kernel's Direct Rendering Manager and handles the management of display planes for graphical content.
The impact of this vulnerability could range from privilege escalation to system crashes or even remote code execution.
No, the actual impact and attack plausibility have not been proven yet.
To fix this vulnerability, update the Linux Kernel package to version v5.4.198 or later.
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