Fix crash in smtcfb_read() in video: fbdev: sm712fb
Summary
GSD-2022-1001286: video: fbdev: sm712fb: Fix crash in smtcfb_read(). Affects Kernel versions < e46779a5706941fb9cd6e0264427953eb77d7888. No fix is published. How to fix ↓
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Background
The video: fbdev: sm712fb package is a component of the Linux Kernel, which is responsible for managing frame buffer devices. It provides a software interface for applications to access and manipulate the video memory of a graphics card. The sm712fb driver specifically supports the Silicon Motion SM712 graphics controller. This vulnerability affects the smtcfb_read() function within the sm712fb driver.
Vulnerability Detail
The smtcfb_read() function in the sm712fb driver of the video: fbdev package is susceptible to a crash. The vulnerability arises due to a lack of proper input validation, allowing an attacker to trigger a null pointer dereference, leading to a system crash. This vulnerability can be exploited by an attacker with local access to the system. The impact of this vulnerability includes denial of service, potential information disclosure, and system instability.
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 essential to apply the provided fix by updating the Linux Kernel to the recommended version.
Conclusion
The video: fbdev package, specifically the sm712fb driver, is vulnerable to a crash in the smtcfb_read() function. This vulnerability can be mitigated by updating the Linux Kernel to version v5.17.2 or later. It is recommended to apply the fix promptly to prevent potential system crashes, denial of service, and information disclosure. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The video: fbdev package is a component of the Linux Kernel that provides a software interface for accessing and manipulating the video memory of a graphics card.
The sm712fb driver is a specific driver within the video: fbdev package that supports the Silicon Motion SM712 graphics controller.
The vulnerability can lead to a system crash, denial of service, potential information disclosure, and system instability.
To fix this vulnerability, update the Linux Kernel to version v5.17.2 or later, which includes the necessary fix for this issue.
No, there is no known workaround for this vulnerability. It is crucial to apply the provided fix by updating the Linux Kernel.
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