Buffer Size Vulnerability in Linux Kernel: Impacting USB Gadget UVC Support
Summary
DEBIAN-CVE-2024-36895: In the Linux kernel, the following vulnerability has been resolved: usb: gadget: uvc: use correct buffer size when parsing configfs lists This commit fixes uvc gadget support on 32-bit platforms. Affects linux versions < 6.8.11-1. Fixed in 6.8.11-1. How to fix ↓
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Background
The Linux kernel is the core component of many operating systems, providing essential services for hardware and software interactions. It supports a wide range of functionalities, including USB device management. The vulnerability in question affects the USB gadget subsystem, specifically the UVC (USB Video Class) support, which is crucial for handling video devices. This vulnerability arises from improper buffer size management, potentially leading to buffer overruns on 32-bit platforms.
Vulnerability Detail
In the Linux kernel, a vulnerability was identified in the USB gadget subsystem related to UVC support. The issue originated from a commit that introduced a new helper function for parsing configuration lists. The function failed to properly check the maximum buffer size, leading to insufficient buffer allocation on 32-bit platforms. This oversight could result in buffer overruns, causing potential crashes or unexpected behavior in applications relying on UVC attributes, such as video streaming applications.
How To Fix
Minimum fixed version
6.8.11-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade linuxTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. However, users are advised to monitor their systems for any unusual behavior and consider temporarily disabling UVC devices until the patch is applied.
Conclusion
The identified vulnerability in the Linux kernel's USB gadget UVC support poses significant risks due to improper buffer size management. Users are encouraged to update their systems to the patched version to mitigate these risks. Regular monitoring and the use of tools like Vulert can help maintain security against such vulnerabilities.
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FAQ
The vulnerability involves improper buffer size management in the Linux kernel's USB gadget UVC support, leading to potential buffer overruns.
The vulnerability affects Linux kernel versions prior to 6.8.11-1 on both Debian 13 and Debian 14.
Exploitation of this vulnerability could lead to application crashes or unexpected behavior in systems using UVC devices.
You can use Vulert, which monitors open-source vulnerabilities in your software. By using the manifest file like package-lock.json, Vulert can alert you in real-time. You can also check your application using the Vulert playground without signup.
While there are no specific workarounds, it is advisable to monitor system behavior and consider disabling UVC devices temporarily.
References
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