RHBA-2026:5926 - Bug Fix Advisory

Topic

Red Hat OpenShift Container Platform release 4.21.8 is now available with updates to packages and images that fix several bugs.

Description

Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments.

This advisory contains the container images for Red Hat OpenShift Container Platform 4.21.8. See the following advisory for the RPM packages for this release:

https://access.redhat.com/errata/RHBA-2026:5920

Space precludes documenting all of the container images in this advisory. See the following Release Notes documentation, which will be updated shortly for this release, for details about these changes:

https://docs.redhat.com/en/documentation/openshift_container_platform/4.21/html/release_notes/

Solution

For OpenShift Container Platform 4.21 see the following documentation, which will be updated shortly for this release, for important instructions
on how to upgrade your cluster and fully apply this asynchronous errata update:

https://docs.redhat.com/en/documentation/openshift_container_platform/4.21/html/release_notes/

You can download the oc tool and use it to inspect release image metadata
for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests
can be found at
https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.

The sha values for the release are as follows:

(For x86_64 architecture)
The image digest is sha256:940b384ee0fe2d29e0aa2317c338c132887b08350732d4959a1fbc5febf9e733

(For s390x architecture)
The image digest is sha256:e2d23e786ae6ab85c9c5a6063ca409f47e6c0ca1e3e438aba40ddb1ad5025d28

(For ppc64le architecture)
The image digest is sha256:e9c0a278376a76dfe7cd3a6a271b567a890068f4331f164151fe61fb597a387c

(For aarch64 architecture)
The image digest is sha256:8c703d8d22e048eaf258d0c7c6ce613e67d509b9f77dede2a3eb4f10327fd02b

All OpenShift Container Platform 4.21 users are advised to upgrade to these updated packages and images when they are available in the appropriate
release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.21/html-single/updating_clusters/index#updating-cluster-cli.

Affected Products

• Red Hat OpenShift Container Platform

Fixes

• OCPBUGS-77251 - Unable to edit secret via console on 4.19.12
• OCPBUGS-77750 - [4.21.z]GNSS Index on ens1f0 Changes After Reboot Causing Node Synchronization Issues
• OCPBUGS-78048 - openshift-enterprise-base image includes subscription-manager, dbus, systemd
• OCPBUGS-78155 - ec2:CreateTags calls for EBS CSI driver on ROSA clusters failing
• OCPBUGS-78241 - ABI OVE installation fails when using cluster-managed networking
• OCPBUGS-78581 - [release-4.21] huge size of log print for endpoint deprecation in prometheus pods in openshift-monitoring
• OCPBUGS-78684 - [4.21] Cluster Autoscaler CAPI provider accumulates replica decrements on paused MachineDeployments causing catastrophic scale-down on unpause
• OCPBUGS-78800 - machine-config-server: controller-runtime logger not initialized - "log.SetLogger(...) was never called" warning on startup
• OCPBUGS-78957 - HostedCluster reconciliation might fail to remove referenced resource annotations
• OCPBUGS-79365 - release-4.21 - Verify etc pod should start with oom_score_adj as system-node-critical

CVEs

(none)

References

(none)