Critical Security Update for ContainerNetworking Plugins: Addressing Denial of Service and Memory Exhaustion Vulnerabilities
Summary
ALSA-2026:3341: Important: containernetworking-plugins security update. Affects containernetworking-plugins versions < 1:1.7.1-3.el9_7. Fixed in 1:1.7.1-3.el9_7. How to fix ↓
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Background
The Container Network Interface (CNI) project provides a specification and libraries for writing plugins that configure network interfaces in Linux containers. It focuses on ensuring network connectivity for containers and managing resource allocation effectively. This package is essential for developers working with containerized applications, as it facilitates seamless networking capabilities. However, recent vulnerabilities have been identified that could compromise the security and performance of applications utilizing this package.
Vulnerability Detail
The vulnerabilities stem from issues in the CNI project related to excessive resource consumption and memory exhaustion. Specifically, CVE-2025-61729 allows for Denial of Service attacks through crafted certificates, while CVE-2025-61726 can lead to memory exhaustion during query parameter parsing. Additionally, CVE-2025-68121 addresses unexpected session resumption in TLS, which could further jeopardize secure communications. These vulnerabilities can lead to significant disruptions in service and potential data exposure.
How To Fix
Minimum fixed version
1:1.7.1-3.el9_7
This is the first release that contains the fix.
sudo dnf update containernetworking-pluginsTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate updating is not feasible, consider implementing network monitoring to detect unusual traffic patterns that may indicate exploitation attempts. Additionally, restrict access to the affected services until the update can be applied.
Conclusion
The identified vulnerabilities in the ContainerNetworking Plugins pose significant risks to applications utilizing this package. It is essential to apply the recommended updates promptly to ensure the security and stability of your containerized environments. Utilizing tools like Vulert can further enhance your ability to monitor and manage vulnerabilities effectively.
See every vulnerability recorded for containernetworking-plugins →
FAQ
The vulnerabilities can lead to Denial of Service attacks and memory exhaustion, potentially disrupting services and affecting application performance.
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Update the 'containernetworking-plugins' package to the latest patched version as soon as possible to mitigate the vulnerabilities.
While specific exploits may not be publicly disclosed, the nature of the vulnerabilities suggests that they could be leveraged for Denial of Service attacks.
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Related vulnerabilities
Recent vulnerabilities recorded for containernetworking-plugins.
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