RHSA-2026:44230: Important: OpenShift Container Platform 4.18.50 bug fix and security update

Red Hat OpenShift Container Platform is Red Hat's cloud computingKubernetes application platform solution designed for on-premise or privatecloud deployments.Space precludes documenting all of the container images in this advisory.See the following Release Notes documentation, which will be updatedshortly for this release, for details about these changes:https://docs.redhat.com/en/documentation/openshiftcontainerplatform/4.18/html/releasenotes/ Security Fix(es): kernel: netfilter: flowtable: strictly check for maximum number of actions (CVE-2026-43329) kernel: Linux kernel: Use-After-Free in net/gro due to improper handling of zerocopy skbs (CVE-2026-46323) kernel: KVM: x86: Fix shadow paging use-after-free due to unexpected role (CVE-2026-53359)For more details about the security issue(s), including the impact, a CVSSscore, acknowledgments, and other related information, refer to the CVEpage(s) listed in the References section.All OpenShift Container Platform 4.18 users are advised to upgrade to theseupdated packages and images when they are available in the appropriaterelease channel. To check for available updates, use the OpenShift CLI (oc)or web console. Instructions for upgrading a cluster are available athttps://docs.redhat.com/en/documentation/openshiftcontainerplatform/4.18/html-single/updatingclusters/index#updating-cluster-cli.

— Red Hat