Kernel NULL Pointer Dereference in MAX3100 Driver - Linux Package Vulnerability
Summary
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 kernel is a core component of many operating systems, providing essential services for hardware management and system resources. The MAX3100 driver is responsible for interfacing with MAX3100 UART devices, enabling communication between the operating system and these hardware components. This driver is crucial for systems that rely on serial communication, making its stability and reliability paramount.
Vulnerability Detail
In the Linux kernel, a vulnerability was identified in the MAX3100 driver where the removal of the last MAX3100 device does not properly update the global variable associated with the UART driver. This oversight can lead to a NULL pointer dereference during subsequent driver loading, resulting in a kernel panic. The vulnerability arises from improper state management within the driver code, specifically during the probe and removal process. The consequences of this vulnerability include system crashes and potential data loss, making it critical for users of affected Linux distributions to apply the necessary fixes.
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. Users are advised to apply the kernel updates as soon as they are available to mitigate the risk.
Conclusion
CVE-2024-38633 presents a significant risk to systems utilizing the MAX3100 driver in the Linux kernel. Users are strongly encouraged to update their systems to the latest kernel versions to mitigate the risk of crashes and data loss. Utilizing tools like Vulert can help in monitoring and managing vulnerabilities effectively.
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FAQ
CVE-2024-38633 is a vulnerability in the Linux kernel's MAX3100 driver that can lead to a kernel panic due to a NULL pointer dereference.
This vulnerability can cause your system to crash when the MAX3100 driver is improperly managed, leading to potential data loss and system instability.
If you are using the MAX3100 driver, it is crucial to update your Linux kernel to the latest fixed version to prevent exploitation of this vulnerability.
Yes, you can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. You can check your application's vulnerability status using the Vulert playground without any signup.
The CVSS score for CVE-2024-38633 is 5.5, indicating a moderate severity level.
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