Kernel Vulnerability in Linux Package: MAX3100 Driver Removal Issue
Summary
DEBIAN-CVE-2024-38633: In the Linux kernel, the following vulnerability has been resolved: serial: max3100: Update uart_driver_registered on driver removal The removal of the last MAX3100 device triggers the removal of the driver. Affects linux versions < 5.10.221-1. Fixed in 5.10.221-1. How to fix ↓
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Background
The Linux package is a core component of the Debian operating system, responsible for managing hardware and system resources. It provides essential functionalities for various devices and drivers, including the MAX3100 UART driver. This package is crucial for ensuring stable and efficient communication between the operating system and hardware components. The vulnerability in question arises from improper handling of the driver removal process, which can lead to system instability.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the MAX3100 UART driver. When the last MAX3100 device is removed, the driver is also removed, but the global variable tracking the driver's registration state is not updated. This oversight can lead to a kernel NULL pointer dereference upon subsequent attempts to reinsert the driver, resulting in a system crash (kernel oops). The vulnerability is rooted in the failure to manage the driver's state correctly during the removal process, which can have severe ramifications for system stability and reliability.
How To Fix
Minimum fixed version
5.10.221-1
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. It is advisable to apply the patch as soon as it is available to mitigate the risk.
Conclusion
The identified vulnerability in the Linux kernel related to the MAX3100 driver poses significant risks to system stability. It is essential for users to update their systems to the patched versions to ensure continued reliability and security. Monitoring tools like Vulert can assist in identifying vulnerabilities in your software without requiring code access.
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FAQ
The vulnerability involves a failure to update the driver's registration state during the removal of the MAX3100 device, leading to potential system crashes.
You can use the Vulert platform to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected.
If exploited, this vulnerability can lead to kernel crashes, resulting in system instability and potential data loss.
Yes, patches are available for various Debian versions. Ensure you update to the specified patched versions to resolve the issue.
While there are no specific workarounds, it is crucial to plan for an update as soon as possible to mitigate risks associated with this vulnerability.
References
Related vulnerabilities
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