Moderate Security Vulnerability in kernel-rt Package: Out-of-Bounds Read in LDT Setup
Summary
ALSA-2025:8744: Moderate: kernel-rt security update. Affects kernel-rt versions < 4.18.0-553.56.1.rt7.397.el8_10. Fixed in 4.18.0-553.56.1.rt7.397.el8_10. How to fix ↓
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Background
The kernel-rt package provides the Real Time Linux Kernel, designed for systems requiring high determinism. This package is crucial for applications that need precise timing and responsiveness, such as industrial automation and real-time data processing. However, it is susceptible to security vulnerabilities that can compromise system integrity.
Vulnerability Detail
The vulnerability identified as CVE-2022-49395 involves an out-of-bounds read in the LDT (Local Descriptor Table) setup process within the kernel. This flaw can potentially allow an attacker to read sensitive memory locations, leading to unauthorized access to critical data or system crashes. The issue arises from improper handling of memory boundaries, which can be exploited in specific scenarios, particularly in environments where the kernel is exposed to untrusted inputs.
How To Fix
Minimum fixed version
4.18.0-553.56.1.rt7.397.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
Currently, no specific workarounds are provided for this vulnerability. The best course of action is to apply the security update as soon as it is available.
Conclusion
The kernel-rt package has a moderate security vulnerability (CVE-2022-49395) that can lead to serious implications if left unaddressed. It is vital to update to the patched version to ensure the security and integrity of your system. Utilizing tools like Vulert can help in monitoring vulnerabilities effectively.
See every vulnerability recorded for kernel-rt →
FAQ
CVE-2022-49395 is a security vulnerability in the kernel-rt package that allows for an out-of-bounds read during LDT setup, potentially exposing sensitive data.
You can use the Vulert platform to monitor and alert for open-source vulnerabilities. Visit Vulert Scanner to check if your application is affected without needing to sign up.
Exploiting this vulnerability could lead to unauthorized access to sensitive information, system instability, or crashes, impacting the overall security of the system.
Yes, a patch is available in version 4.18.0-553.56.1.rt7.397.el8_10 of the kernel-rt package. It is recommended to update to this version.
While there are no specific workarounds, it is crucial to monitor your system for any suspicious activity and apply the update as soon as possible.
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