Critical Security Flaw in kernel-rt Package: Important Kernel Update Required
Summary
RLSA-2026:72467: Important: kernel-rt security update. Affects kernel-rt versions < 0:4.18.0-553.169.1.rt7.510.el8_10. Fixed in 0:4.18.0-553.169.1.rt7.510.el8_10. How to fix ↓
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Background
The kernel-rt package provides the 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 telecommunications and industrial automation. However, this package has been identified with multiple vulnerabilities that could compromise system security and stability.
Vulnerability Detail
The vulnerabilities in the kernel-rt package stem from various issues, including out-of-bounds reads, denial of service, and improper handling of memory and events. These vulnerabilities can lead to unauthorized access, system crashes, or data corruption. Specifically, CVE-2025-40323 addresses a flaw in framebuffer console handling, while CVE-2026-45942 resolves bitmap inconsistency in ext4 file systems. The overall CVSS score for these vulnerabilities is 8.8, indicating a high severity level that necessitates immediate attention.
How To Fix
Minimum fixed version
0:4.18.0-553.169.1.rt7.510.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, there are no specific workarounds mentioned for these vulnerabilities. The best course of action is to apply the available security updates as soon as possible.
Conclusion
The kernel-rt package has been identified with critical vulnerabilities that require immediate attention. Updating to the latest patched version is essential to maintain system security and stability. Regular monitoring and updates are crucial for safeguarding against potential threats.
See every vulnerability recorded for kernel-rt →
FAQ
The kernel-rt package is a Real Time Linux Kernel designed for applications that require high determinism and low latency.
These vulnerabilities can lead to unauthorized access, system crashes, or data corruption, significantly affecting system integrity and availability.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. Visit Vulert Scanner to check your application without needing to sign up.
The CVSS score for these vulnerabilities is 8.8, indicating a critical level of severity.
It is recommended to regularly check for updates and apply them promptly to ensure your system remains secure.
References
Related vulnerabilities
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