Fix crash in smtcfb_write() in video: fbdev: sm712fb
Summary
GSD-2022-1001454: video: fbdev: sm712fb: Fix crash in smtcfb_write(). Affects Kernel versions < aeb635b49530b7d19e140949753409f759ba99be. No fix is published. How to fix ↓
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Background
The video: fbdev: sm712fb package is a component of the Linux Kernel. It provides support for the Silicon Motion SM712 graphics controller. This controller is commonly used in embedded systems and provides framebuffer functionality. The smtcfb_write() function within the package is responsible for writing data to the framebuffer. However, a vulnerability has been discovered in this function that can lead to a crash.
Vulnerability Detail
The vulnerability in smtcfb_write() can be triggered by a malicious user or application sending specially crafted data to the framebuffer. This can cause the function to access invalid memory, resulting in a crash. The impact of this vulnerability is a denial of service, as the system will become unresponsive and require a reboot to recover. The vulnerability has been fixed in Linux Kernel version v5.16.19 by commit aeb635b49530b7d19e140949753409f759ba99be.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. Updating the Linux Kernel to the fixed version is the recommended solution.
Conclusion
The video: fbdev: sm712fb package in the Linux Kernel is vulnerable to a crash in the smtcfb_write() function. This vulnerability can be exploited to cause a denial of service. It is recommended to update the Linux Kernel to version v5.16.19 or later to fix this vulnerability. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The impact of this vulnerability is a denial of service, as the system will become unresponsive and require a reboot to recover.
To fix this vulnerability, update the Linux Kernel to version v5.16.19 or later.
No, there is no known workaround for this vulnerability.
The fixed version of the Linux Kernel can be found in the official Linux Kernel repository (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/).
You can use Vulert's playground (https://vulert.com/scanner) to check if your application is affected by this vulnerability without requiring access to the code or installation.
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