RHSA-2026:57801 - Security Advisory

Topic

Red Hat OpenShift Container Platform release 4.21.30 is now available with updates to packages and images that fix several bugs and add enhancements.

This release includes a security update for Red Hat OpenShift Container Platform 4.21.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

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 4.21.30. See the following advisory for the RPM packages for this release:

https://access.redhat.com/errata/RHSA-2026:57456

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 may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may 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 sha256:249ceebaa2b02ce15ab132d36db4c0babffa8b783fcbb7e328bec5301742e904

(For s390x architecture)
The image digest is sha256:9a4dbf0b6b633404ebd59da5a1d8d646f2693c0aae16ea9d69acf96b4e8494f9

(For ppc64le architecture)
The image digest is sha256:bd47f591cf8e997beb46d29c5bbdec946ca96c44ad4fb87b904a1794d03627fa

(For aarch64 architecture)
The image digest is sha256:ffe299bf20746f9b40431e5edb66ddcfb77effe9389a966c8edb20388b10223a

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

• BZ - 2456338
• BZ - 2464306
• BZ - 2480675
• BZ - 2480678
• BZ - 2480681
• BZ - 2480684
• BZ - 2488480
• BZ - 2506433
• OCPBUGS-100439 - [CI][OpenStack][sig-etcd][EtcdVerticalScaling] OnDelete CPMSO test fails getting etcd client via port-forward
• OCPBUGS-104586 - [4.21] e2e: clear hugepages before switching kernelPageSize to 4k
• OCPBUGS-105600 - ovn-k images are bloated with rhel8 builds
• OCPBUGS-105864 - Code Snippet Rendering Failure for Quick Start {{execute}} (OCP 4.21)
• OCPBUGS-31521 - Gateway API gateway is allowed to request same wildcard hostname as ingress controller apps domain
• OCPBUGS-54806 - Metrics for UDN/CUDN usage
• OCPBUGS-84923 - [release-4.21] Run EVPN E2Es via OTE

CVEs

• CVE-2026-12143
• CVE-2026-14257
• CVE-2026-32283
• CVE-2026-39829
• CVE-2026-39830
• CVE-2026-39831
• CVE-2026-43003
• CVE-2026-46597

References

• https://access.redhat.com/security/updates/classification/