Critical Locking Issue in Linux Kernel's MAX3100 Driver
Summary
CVE-2024-38634: In the Linux kernel, the following vulnerability has been resolved: serial: max3100: Lock port->lock when calling uart_handle_cts_change() uart_handle_cts_change() has to be called with port lock taken, Since we run it i... Affects linux versions < 5.10.221-1. Fixed in 5.10.221-1. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The Linux kernel is a widely used open-source operating system kernel that serves as the foundation for various Linux distributions. It manages hardware resources and provides essential services for software applications. The MAX3100 driver is a serial communication driver within the Linux kernel that facilitates communication with MAX3100 UART devices. This driver is crucial for ensuring reliable data transmission and reception. However, it has been identified to have a vulnerability that can lead to system instability and potential crashes.
Vulnerability Detail
In the Linux kernel, specifically within the MAX3100 driver, there exists a vulnerability related to the handling of the Clear To Send (CTS) signal. The function uart_handle_cts_change() must be executed with the port lock taken to ensure thread safety. However, due to its execution in a separate work queue, the lock may not be held at the time of invocation, leading to a race condition. This oversight can result in a system warning and potential crashes, as indicated by the warning message generated during operation. The lack of proper locking mechanisms can compromise system stability and data integrity.
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. The best course of action is to apply the kernel updates as outlined in the 'how_to_fix' section.
Conclusion
The CVE-2024-38634 vulnerability in the Linux kernel's MAX3100 driver poses a significant risk to system stability due to improper locking during signal handling. Users are strongly encouraged to update their kernel to the latest versions to mitigate this risk. Utilizing tools like Vulert can help monitor and identify vulnerabilities in your software.
See every vulnerability recorded for linux →
FAQ
CVE-2024-38634 is a vulnerability in the Linux kernel's MAX3100 driver that can lead to system instability due to improper locking mechanisms during the handling of the CTS signal.
You can use Vulert, which monitors open-source vulnerabilities in your software. By using the Vulert playground, you can check if your application is affected by CVE-2024-38634 without requiring any installation.
The vulnerability can lead to system warnings and potential crashes, affecting the stability and reliability of applications relying on the MAX3100 driver.
Yes, patches are available in the updated versions of the Linux kernel. Users should upgrade to the specified versions to mitigate the risk.
While there are no specific workarounds, it is advisable to monitor your system for unusual behavior and plan for an update as soon as possible.
Related vulnerabilities
Recent vulnerabilities recorded for linux.
