Fix crash in smtcfb_read() in video: fbdev: sm712fb
Summary
GSD-2022-1001594: video: fbdev: sm712fb: Fix crash in smtcfb_read(). Affects Kernel versions < 34d986f6ee5f5ac48cd2b9e2d061196fd3c29d39. No fix is published. How to fix ↓
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Background
The video: fbdev: sm712fb is a driver in the Linux Kernel that provides support for the Silicon Motion SM712 graphics controller. This driver allows the operating system to communicate with the graphics hardware and display graphics on the screen. The smtcfb_read() function in this driver is responsible for reading data from the framebuffer. However, a vulnerability has been discovered in this function that can lead to a crash in the system.
Vulnerability Detail
The vulnerability in smtcfb_read() is caused by a lack of proper input validation. An attacker can exploit this vulnerability by sending specially crafted input to the function, triggering a crash in the system. This crash can potentially lead to a denial of service (DoS) condition, impacting the availability of the affected system. The vulnerability has been fixed in Linux Kernel version v5.16.19 by commit 34d986f6ee5f5ac48cd2b9e2d061196fd3c29d39.
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 mentioned above.
Conclusion
The vulnerability in smtcfb_read() in video: fbdev: sm712fb can lead to a system crash and denial of service (DoS) condition. It is crucial to update the Linux Kernel to version v5.16.19 or later to mitigate this vulnerability. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
video: fbdev: sm712fb is a driver in the Linux Kernel that provides support for the Silicon Motion SM712 graphics controller. It allows the operating system to communicate with the graphics hardware and display graphics on the screen.
The vulnerability can lead to a crash in the system, potentially causing a denial of service (DoS) condition and impacting the availability of the affected system.
To fix this vulnerability, users should update their Linux Kernel to version v5.16.19 or later by downloading the latest version of the Linux Kernel source code from the official repository and compiling it according to the provided instructions.
There is no known workaround for this vulnerability. It is recommended to apply the fix mentioned above.
For more information about this vulnerability, you can refer to the vulnerability database entry at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1001xxx/GSD-2022-1001594.json
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