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Fedora 43 Critical Advisory on Container Networking Plugins DoS Threat

fedora
Calendar Grey March 25, 2026
Dist Fedora Esm H88
Fedora 43 contains updates for containernetworking-plugins addressing critical container escape and denial of service risks.
Update to release v1.9.1 Resolves: rhbz#2448053, rhbz#2423997, rhbz#2424031 Upstream fixes

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 Resolves: rhbz#2448053, rhbz#2423997, rhbz#2424031 Upstream fixes

Topics%20covered

Topics Covered

security advisory denial of service fedora critical cni 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-2026-8ee0451243' 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
critical
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Name: containernetworking-plugins
Product: Fedora 43
Version: 1.9.1
Release: 1.fc43
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 critical cni containernetworking-plugins

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