Critical Security Update for Real Time Linux Kernel: kernel-rt Vulnerability
Summary
ALSA-2026:72467: Important: kernel-rt security update. Affects kernel-rt versions < 4.18.0-553.169.1.rt7.510.el8_10. Fixed in 4.18.0-553.169.1.rt7.510.el8_10. How to fix ↓
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Background
The kernel-rt package provides a Real Time Linux Kernel designed for systems requiring high determinism. It is essential for applications where timing and responsiveness are critical, such as in industrial automation, telecommunications, and real-time data processing. The kernel-rt package allows for fine-tuning of system performance, ensuring that tasks are executed within precise time constraints. However, vulnerabilities in this package can lead to severe security risks, including unauthorized access and system instability.
Vulnerability Detail
The kernel-rt vulnerability arises from multiple security flaws, including out-of-bounds (OOB) reads, denial of service (DoS) conditions, and inconsistencies in bitmap reporting. These vulnerabilities can be exploited by attackers to gain unauthorized access, execute arbitrary code, or cause system crashes. Specific issues include improper handling of framebuffer console modes, inconsistencies in ext4 filesystem bitmap reports, and flaws in the amdgpu driver that could lead to memory corruption. The vulnerabilities are tracked under various CVEs, highlighting their significance and potential impact on system security.
How To Fix
Minimum fixed version
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
As a temporary workaround, users can limit access to the affected components of the kernel-rt package or disable specific features that are known to be vulnerable until the system can be updated. However, this is not a permanent solution and should only be used until the patch is applied.
Conclusion
The kernel-rt vulnerability presents significant security risks that can affect systems requiring high performance and reliability. It is crucial to apply the recommended updates to mitigate these risks and ensure system integrity. Users are encouraged to utilize tools like Vulert for ongoing monitoring of vulnerabilities in their software environments.
See every vulnerability recorded for kernel-rt →
FAQ
The kernel-rt package provides a Real Time Linux Kernel optimized for applications requiring high determinism and precise timing.
The vulnerabilities can lead to unauthorized access, system crashes, and potential exploitation by attackers, compromising system integrity.
You can use the Vulert platform to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check your application without needing to sign up.
Consider implementing temporary workarounds, such as limiting access to vulnerable components, until you can apply the necessary updates.
Detailed information about the CVEs can be found on the respective CVE pages linked in the security advisory.
Related vulnerabilities
Recent vulnerabilities recorded for kernel-rt.
