Issued:

2026-03-10

Updated:

2026-03-10

RHBA-2026:3881 - OpenShift Container Platform 4.21.5 bug fix update

Synopsis

OpenShift Container Platform 4.21.5 bug fix update

Type/Severity

Bug Fix Advisory None

Topic

Red Hat OpenShift Container Platform release 4.21.5 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 4.21.5. See the following advisory for the RPM packages for this release:

https://access.redhat.com/errata/RHBA-2026:3858

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 Content from quay.io is not included.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:ae0711cb2b35d8661d086945e0578f9cd2d417093e910e47169447db5dd9f8bd

(For s390x architecture) The image digest is sha256:42dd488998bf2a911643053a19ed53ad64e8f98522187445bf3b987f419b38c2

(For ppc64le architecture) The image digest is sha256:3e23761bf09ceee4d610651b4687e428e46f11a4d6690fd51701219a8f45f075

(For aarch64 architecture) The image digest is sha256:a1113544323afe45b5f9238a27f40111b102ea8889391e16292ad0b15cfa2255

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

Fixes

(none)

CVEs

(none)

References

(none)

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.