Privilege Escalation Vulnerability in Kernel Packages of AlmaLinux 8
Summary
ALSA-2026:50978: Important: kernel security, bug fix, and enhancement update. Affects bpftool versions < 4.18.0-553.153.1.el8_10. Fixed in 4.18.0-553.153.1.el8_10. How to fix ↓
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Background
The kernel packages are essential components of the Linux operating system, providing the core functionalities required for system operations. They manage hardware resources, execute processes, and ensure system stability. This vulnerability affects the kernel of AlmaLinux 8, specifically targeting AMD Zen 2 processors, which are widely used in various server and desktop environments.
Vulnerability Detail
The vulnerability identified as CVE-2025-54518 allows for privilege escalation due to improper CPU cache isolation in AMD Zen 2 processors. This flaw can potentially enable an attacker to gain elevated privileges, compromising the integrity and security of the system. The issue arises from the way the kernel handles CPU cache, which can be exploited to access sensitive information or execute unauthorized commands.
How To Fix
Minimum fixed version
4.18.0-553.153.1.el8_10
This is the first release that contains the fix.
sudo dnf update bpftoolTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary measure, users can limit access to the affected systems and monitor for any suspicious activities. However, the best course of action is to apply the patch as soon as it becomes available.
Conclusion
The identified vulnerability in the kernel packages of AlmaLinux 8 poses significant risks, particularly for systems utilizing AMD Zen 2 processors. It is essential to apply the necessary updates to mitigate these risks and maintain system integrity. Regular monitoring and prompt updates are crucial for safeguarding against such vulnerabilities.
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FAQ
CVE-2025-54518 is a vulnerability that allows privilege escalation on AMD Zen 2 processors due to improper CPU cache isolation.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
The risks include unauthorized access to sensitive data and the ability to execute commands with elevated privileges, potentially compromising the entire system.
It is recommended to regularly check for updates and apply them promptly to ensure your system is protected against known vulnerabilities.
Vulert monitors and alerts for open-source vulnerabilities in your software using a manifest file like package-lock.json, providing real-time insights into potential risks.
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