Null Pointer Dereference in video: fbdev: smscufx
Summary
GSD-2022-1001268: video: fbdev: smscufx: Fix null-ptr-deref in ufx_usb_probe(). Affects Kernel versions >= 3c8a63e22a0802fd56380f6ab305b419f18eb6f5, < 9280ef235b05e8f19f8bc6d547b992f0a0ef398d. No fix is published. How to fix ↓
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Background
The video: fbdev: smscufx package is a component of the Linux Kernel. It provides support for the SMSC UFX USB DisplayLink driver, which allows users to connect external displays via USB. This vulnerability affects versions of the Linux Kernel from v3.2 to v5.17.1. The package is widely used in Linux-based systems and is critical for enabling USB display functionality.
Vulnerability Detail
The vulnerability in video: fbdev: smscufx is a null pointer dereference issue that occurs in the ufx_usb_probe() function. This vulnerability was introduced in version v3.2 of the Linux Kernel and was fixed in version v5.17.2. An attacker could exploit this vulnerability by sending a specially crafted USB request, leading to a null pointer dereference and potentially causing a system crash or arbitrary code execution. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.17.2 or later. This can be done by downloading the latest stable version of the Linux Kernel from the official repository (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/) and following the installation instructions provided. Additionally, it is advisable to regularly update the Linux Kernel to ensure the latest security patches are applied.
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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
The null pointer dereference vulnerability in video: fbdev: smscufx can lead to system crashes or arbitrary code execution. It is recommended to update the Linux Kernel to version v5.17.2 or later to mitigate this vulnerability. Regularly updating the Linux Kernel is also advised to stay protected against the latest security threats. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability could range from a system crash to potential arbitrary code execution, depending on how it is exploited.
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 Vulert will analyze it for any open-source vulnerabilities, including this one.
At the time of this report, there are no known exploits for this vulnerability. However, it is important to apply the recommended fix to mitigate any potential risks.
Yes, this vulnerability can be exploited remotely by sending a specially crafted USB request to the affected system.
There is no evidence of active attacks exploiting this vulnerability at the time of this report. However, it is crucial to apply the fix to prevent any potential future attacks.
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