RHBA-2026:4420 - Bug Fix Advisory

Topic

Red Hat OpenShift Container Platform release 4.21.6 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 4.21.6. See the following advisory for the RPM packages for this release:

https://access.redhat.com/errata/RHBA-2026:4416

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 sha256:683c4a4eed9c4005b7d331fe0e55b5f943b1d57f40f4d4b77f059f52ad127092

(For s390x architecture)
The image digest is sha256:833db4fb867ab91de6d9ab729ea789dd63266d4c7f8f07d0f30db81dc7455ae2

(For ppc64le architecture)
The image digest is sha256:ad63928ee4b665e025e06412fbda3052477b60883884d9d113e82d98f59232fa

(For aarch64 architecture)
The image digest is sha256:4e8106973e1d6196e9a28658cc11ad066f2cc9423bf2bc3d30bfd9f3058f2ee8

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-74425 - Collection profile minimal leads to ControlPlaneStatus "unknown" in console
• OCPBUGS-74701 - CSI driver operators re-deploy DaemonSet too often
• OCPBUGS-74933 - OVE UI Update Konflux task-rpms-signature-scan
• OCPBUGS-76386 - i18n upload/download routine task - 4.21 / 281
• OCPBUGS-76408 - DynamicConfigurationManager regressed from TPNU to DPNU
• OCPBUGS-76472 - OVN_LOG_LEVEL=err is not reflecting for ovnkube-controller container
• OCPBUGS-76541 - NodeRAIDDegraded & NodeRAIDDiskFailure alerts cannot trigger
• OCPBUGS-77031 - Ironic discovery image should report what it is on the console
• OCPBUGS-77154 - OCP 4.18.3 Introduces a regression where EgressIP addresses respond to Azure Load Balancer health probes for ingress NodePorts, causing intermittent external connection failures
• OCPBUGS-77418 - ironic API port 6385 not accessible via Kubernetes service when using ironic-proxy
• OCPBUGS-77534 - [Automated] Update AMI Whitelist
• OCPBUGS-77536 - ABI OVE: Node fails to reboot due to sysroot.mount and ignition-ostree-transposefs-autosave-xfs.service failures
• OCPBUGS-77538 - Backport AGENT-1447 Override prefilled rendezvousIP
• OCPBUGS-77551 - node-image-pull.service is failing to fetch release image, resulting installation failure
• OCPBUGS-77577 - Component Readiness: [Machine Config Operator] [operator-conditions] MCO incorrectly map MachineSets to failure domains, resulting in datacenter lookup failures and installation timeouts
• OCPBUGS-77580 - OLM's unpack-bundles and marketplace-operator NetworkPolicy is not compatible with HyperShift's KAS port customization
• OCPBUGS-77712 - Update NetworkPolicy egress in OLM to support HyperShift custom API ports
• OCPBUGS-77826 - Cluster Operator olm did not report Progressing=True during a cluster update
• OCPBUGS-77833 - [Automated] Update AMI Whitelist
• OCPBUGS-77882 - [release-4.21] Unable to save modified project access in developer view when not quick enough
• OCPBUGS-77908 - [release-4.21] add app.kubernetes.io/part-of=openshift-monitoring label to thanos-ruler pod
• OCPBUGS-77969 - [4.21] Add event-ttl e2e test for GA

CVEs

(none)

References

(none)