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Fedora 42 contains critical DoS issue in containernetworking-plugins update

fedora
Calendar Grey March 25, 2026
Dist Fedora Esm H88
Explore the Fedora 42 update for containernetworking-plugins addressing critical container escape issues and DoS.
Update to release v1.9.1

Summary

Reference and example networking plugins, maintained by the CNI team.

The CNI (Container Network Interface) project consists of a specification

and libraries for writing plugins to configure network interfaces in Linux

containers, along with a number of supported plugins. CNI concerns itself

only with network connectivity of containers and removing allocated resources

when the container is deleted.

Update Information:

Update to release v1.9.1

Topics%20covered

Topics Covered

security advisory denial of service fedora important container escape containernetworking-plugins

Change Log

* Mon Mar 16 2026 Bradley G Smith - 1.9.1-1 - Update to release v1.9.1 - Resolves: rhbz#2448053, rhbz#2423997, rhbz#2424031 - Upstream fixes * Mon Feb 2 2026 Maxwell G - 1.9.0-4 - Rebuild for https://fedoraproject.org/wiki/Changes/golang1.26 * Fri Jan 16 2026 Fedora Release Engineering - 1.9.0-3 - Rebuilt for https://fedoraproject.org/wiki/Fedora_44_Mass_Rebuild * Fri Jan 16 2026 Fedora Release Engineering - 1.9.0-2 - Rebuilt for https://fedoraproject.org/wiki/Fedora_44_Mass_Rebuild

References


[ 1 ] Bug #2423997 - [Minor Incident] CVE-2025-52881 containernetworking-plugins: container escape and denial of service due to arbitrary write gadgets and procfs write redirects [fedora-42] https://bugzilla.redhat.com/show_bug.cgi?id=2423997 [ 2 ] Bug #2424031 - [Minor Incident] CVE-2025-52881 containernetworking-plugins: container escape and denial of service due to arbitrary write gadgets and procfs write redirects [fedora-43] https://bugzilla.redhat.com/show_bug.cgi?id=2424031 [ 3 ] Bug #2448053 - containernetworking-plugins-1.9.1 is available https://bugzilla.redhat.com/show_bug.cgi?id=2448053

Update Instructions

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-7ed700921c' at the command line. For more information, refer to the dnf documentation available at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

Severity
important
Lowest
Low
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Critical

Name: containernetworking-plugins
Product: Fedora 42
Version: 1.9.1
Release: 1.fc42
URL: https://github.com/containernetworking/plugins
Summary: Reference and example networking plugins, maintained by the CNI team

Topics%20covered

Topics Covered

security advisory denial of service fedora important container escape containernetworking-plugins

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