Kernel Security Update: Addressing Multiple Vulnerabilities in AlmaLinux Packages
Summary
ALSA-2025:19931: Moderate: kernel security update. Affects bpftool versions < 4.18.0-553.83.1.el8_10. Fixed in 4.18.0-553.83.1.el8_10. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The kernel is the core component of any Linux operating system, responsible for managing system resources and facilitating communication between hardware and software. AlmaLinux, a community-driven enterprise-level Linux distribution, relies on a stable and secure kernel to ensure optimal performance and security. The recent vulnerabilities identified in the kernel packages could potentially compromise system integrity and data security, making timely updates essential for users.
Vulnerability Detail
The vulnerabilities stem from various issues within the kernel packages, including a conditional IBPB mitigation for CVE-2025-40300, a race condition in zswap writeback for CVE-2023-53178, and a use-after-free (UAF) and general protection fault (GPF) bug in nilfs_mdt_destroy for CVE-2022-50367. These vulnerabilities could allow attackers to exploit system resources, leading to unauthorized access, data corruption, or system crashes.
How To Fix
Minimum fixed version
4.18.0-553.83.1.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
Currently, there are no specific workarounds mentioned for these vulnerabilities other than applying the available updates. Users are advised to keep their systems updated regularly to mitigate potential risks.
Conclusion
The kernel security update for AlmaLinux addresses critical vulnerabilities that could compromise system security. Users are strongly encouraged to update their kernel packages to the latest patched version to ensure their systems remain secure and functional. Regular monitoring and updates are essential for maintaining a secure operating environment.
See every vulnerability recorded for bpftool →
FAQ
The update addresses vulnerabilities related to conditional IBPB mitigation, a race condition in zswap writeback, and a use-after-free bug in nilfs_mdt_destroy.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time. Visit Vulert Scanner to check if your application is affected without requiring any signup.
While there are no specific workarounds, it is crucial to plan for an update as soon as possible to mitigate risks associated with these vulnerabilities.
Updating the kernel may require a system reboot, but it should not negatively impact your applications. However, it's always advisable to back up critical data before performing updates.
For detailed information, refer to the CVE pages linked in the advisory, which provide insights into the vulnerabilities and their implications.
Related vulnerabilities
Recent vulnerabilities recorded for bpftool.
