Denial of Service Vulnerability in Kernel Package - CVE-2025-68214
Summary
ALSA-2026:49870: Low: kernel security, bug fix, and enhancement update. Affects kernel versions < 5.14.0-687.34.1.el9_8. Fixed in 5.14.0-687.34.1.el9_8. How to fix ↓
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Background
The kernel package is a fundamental component of the Linux operating system, responsible for managing system resources and facilitating communication between hardware and software. It provides essential services such as process management, memory management, and device control. The kernel is critical for system stability and performance, making its security paramount. This vulnerability specifically affects the kernel in AlmaLinux 9, which is widely used in enterprise environments.
Vulnerability Detail
The vulnerability identified as CVE-2025-68214 is a Denial of Service (DoS) issue caused by a NULL function pointer race in timer shutdown. This flaw can lead to system instability, causing the kernel to crash or become unresponsive, which can severely impact the availability of services running on the affected system. Attackers can exploit this vulnerability to disrupt normal operations, potentially leading to data loss or downtime.
How To Fix
Minimum fixed version
5.14.0-687.34.1.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
Currently, no specific workarounds are provided for this vulnerability. The best course of action is to apply the patch as soon as it is available.
Conclusion
The CVE-2025-68214 vulnerability poses a significant risk to systems running the affected kernel package in AlmaLinux 9. It is crucial to apply the available patch to mitigate the risk of Denial of Service attacks and ensure system stability.
See every vulnerability recorded for kernel →
FAQ
CVE-2025-68214 is a Denial of Service vulnerability in the Linux kernel that can cause system crashes due to a NULL function pointer race in timer shutdown.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
Exploitation of this vulnerability can lead to system instability, crashes, and potential downtime for services running on the affected kernel.
You can update your kernel package by running 'sudo dnf update kernel' in the terminal and then rebooting your system.
Currently, there are no specific workarounds available. The recommended action is to apply the patch provided in the update.
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