Divide-by-zero bug in ark_set_pixclock() in video: fbdev: arkfb
Summary
GSD-2022-1005560: video: fbdev: arkfb: Fix a divide-by-zero bug in ark_set_pixclock(). Affects Kernel versions >= 681e14730c73cc2c71af282c001de6bc71c22f00, < 236c1502520b7b08955467ec2e50b3232e34f1f9. No fix is published. How to fix ↓
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Background
The video: fbdev: arkfb package is a component of the Linux Kernel. It provides support for the ARK Logic ARK2000PV and ARK2000MT graphics cards. The ark_set_pixclock() function is responsible for setting the pixel clock frequency for these graphics cards. However, a divide-by-zero bug has been discovered in this function, which can lead to potential security vulnerabilities.
Vulnerability Detail
The divide-by-zero bug in ark_set_pixclock() allows an attacker to trigger a divide-by-zero error by providing a specially crafted input. This can lead to a system crash or potentially allow the attacker to execute arbitrary code with kernel privileges. The vulnerability was introduced in version v2.6.22 of the Linux Kernel and has been fixed in version v5.15.61.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is recommended to apply the fix by updating the Linux Kernel.
Conclusion
The divide-by-zero bug in ark_set_pixclock() in the video: fbdev: arkfb package can lead to system crashes and potential code execution with kernel privileges. It is crucial to update the Linux Kernel to version v5.15.61 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
This vulnerability can lead to a system crash or allow an attacker to execute arbitrary code with kernel privileges.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and the Vulert Playground will analyze it for vulnerabilities.
At the time of this report, there is no known exploit for this vulnerability. However, it is important to apply the fix as soon as possible to mitigate the risk.
Yes, this vulnerability can be exploited remotely if the attacker can send specially crafted input to the vulnerable function.
The only known mitigation for this vulnerability is to update the Linux Kernel to the fixed version.
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