Kernel Vulnerability in AlmaLinux: Moderate Security Flaw in Kernel Packages
Summary
ALSA-2026:51035: Moderate: kernel security, bug fix, and enhancement update. Affects kernel versions < 5.14.0-687.36.1.el9_8. Fixed in 5.14.0-687.36.1.el9_8. 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-grade Linux distribution, relies on a stable and secure kernel to ensure optimal performance and security. The recent vulnerabilities identified in the kernel packages can potentially compromise system integrity and performance.
Vulnerability Detail
The vulnerabilities identified in the kernel packages include a use-after-free (UaF) issue in the futex subsystem (CVE-2026-23415) and an out-of-bounds (OOB) read in the netfilter subsystem (CVE-2026-43450). These vulnerabilities can lead to unauthorized access to sensitive data, system crashes, or even remote code execution, posing significant risks to system security and stability.
How To Fix
Minimum fixed version
5.14.0-687.36.1.el9_8
This is the first release that contains the fix.
sudo dnf update kernelTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users may consider disabling the affected kernel features, though this is not recommended as a long-term solution. It is best to apply the patch as soon as possible to mitigate risks.
Conclusion
The identified vulnerabilities in the AlmaLinux kernel packages pose serious security risks that can compromise system integrity and performance. It is crucial to update to the patched version promptly to mitigate these risks and ensure the continued security of your system.
See every vulnerability recorded for kernel →
FAQ
The main vulnerabilities include a use-after-free issue in the futex subsystem and an out-of-bounds read in the netfilter subsystem.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time. Check your application using the Vulert playground at Vulert Scanner.
These vulnerabilities can lead to unauthorized access, system crashes, or remote code execution, significantly affecting system security.
You can update your kernel packages by running 'sudo dnf update kernel' in the terminal and rebooting your system afterward.
While a temporary workaround may involve disabling affected kernel features, it is strongly advised to apply the patch instead.
Related vulnerabilities
Recent vulnerabilities recorded for kernel.
