Null Pointer Dereference in drm/msm Package
Summary
GSD-2021-1001772: drm/msm: Fix null pointer dereference on pointer edp. Affects Kernel versions >= ab5b0107ccf3821a6837b0f2819270d6fa0b278f, < f175b9a83e5c252d7c74acddc792840016caae0a. No fix is published. How to fix ↓
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Background
The drm/msm package is a component of the Linux Kernel that provides support for graphics and display functionality on Qualcomm Snapdragon chipsets. It includes drivers for various display interfaces, such as HDMI, DisplayPort, and Embedded DisplayPort (eDP). The package is responsible for managing the communication between the kernel and the graphics hardware, enabling the rendering and output of graphics on supported devices.
Vulnerability Detail
The vulnerability identified in the drm/msm package is a null pointer dereference issue that occurs when accessing a pointer named 'edp'. This vulnerability can be exploited by an attacker to cause a denial-of-service (DoS) condition or potentially execute arbitrary code with kernel privileges. The null pointer dereference occurs when the 'edp' pointer is dereferenced without proper validation, leading to a crash or system instability. 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 available for this vulnerability. It is recommended to apply the fix by updating the Linux Kernel to the latest stable version.
Conclusion
The null pointer dereference vulnerability in the drm/msm package of the Linux Kernel can potentially lead to a denial-of-service condition or arbitrary code execution. It is crucial to update the Linux Kernel to version v4.4.290 or later to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
A null pointer dereference occurs when a program attempts to access or dereference a pointer that has a null (empty) value. This can lead to crashes, system instability, or potential security vulnerabilities.
The null pointer dereference vulnerability in the drm/msm package can result in a denial-of-service (DoS) condition or potentially allow an attacker to execute arbitrary code with kernel privileges. This could lead to a complete system compromise or unauthorized access to sensitive information.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Vulert monitors and alerts in real-time for open-source vulnerabilities, using just a manifest file like package-lock.json to provide insights into the vulnerability status of your software.
Yes, a patch for this vulnerability is available in the Linux Kernel version v4.4.290. It is recommended to update to this version or later to address the null pointer dereference issue.
You can find more information about this vulnerability in the GSD-2021-1001772 entry of the GSD Database maintained by the Cloud Security Alliance. The entry provides details about the vulnerability, its impact, and the fix implemented in the Linux Kernel.
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