Moderate Security Vulnerability in kernel-rt Package: CVE-2024-43842
Summary
ALSA-2025:8247: Moderate: kernel-rt security update. Affects kernel-rt versions < 4.18.0-553.54.1.rt7.395.el8_10. Fixed in 4.18.0-553.54.1.rt7.395.el8_10. How to fix ↓
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Background
The kernel-rt package provides a Real Time Linux Kernel, designed for systems that require high determinism and low latency. It is essential for applications that demand precise timing and responsiveness, such as industrial automation and real-time data processing. However, like any software, it can be susceptible to vulnerabilities that may compromise system integrity and security.
Vulnerability Detail
The vulnerability identified as CVE-2024-43842 arises from an array index mistake in the rtw89_sta_info_get_iter() function within the kernel's wifi subsystem. This flaw could potentially allow an attacker to exploit the system, leading to unauthorized access or manipulation of data. The implications of this vulnerability are significant, as it affects the stability and security of systems relying on the kernel-rt package for real-time operations.
How To Fix
Minimum fixed version
4.18.0-553.54.1.rt7.395.el8_10
This is the first release that contains the fix.
sudo dnf update kernel-rtTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users may consider disabling the affected wifi functionality until the patch is applied. This can be done by running the command: 'sudo modprobe -r rtw89'. However, this is not a permanent solution and updating the package is strongly advised.
Conclusion
The kernel-rt package has a moderate security vulnerability (CVE-2024-43842) that needs to be addressed promptly. Updating to the patched version is crucial to maintaining system security and integrity. Users are encouraged to monitor their systems for vulnerabilities using tools like Vulert.
See every vulnerability recorded for kernel-rt →
FAQ
CVE-2024-43842 is a security vulnerability in the kernel-rt package that stems from an array index mistake in the wifi subsystem, potentially allowing unauthorized access.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
Failing to address this vulnerability could lead to unauthorized access, data manipulation, and compromise the overall security and stability of your system.
Yes, you should update to version 4.18.0-553.54.1.rt7.395.el8_10 to mitigate the vulnerability.
Yes, you can disable the wifi functionality using the command 'sudo modprobe -r rtw89', but this is only a temporary workaround.
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