RHSA-2026:17468 - Security Advisory

Topic

Red Hat OpenShift Container Platform release 4.20.23 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 4.20.

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

https://access.redhat.com/errata/RHBA-2026:17466

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/4.20/html/release_notes/

Solution

For OpenShift Container Platform 4.20 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/4.20/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 sha256:4a03c010c9c554dc86066a7130002cc8c0bdd13da6207a7eab299f1013690dbd

(For s390x architecture)
The image digest is sha256:b0c8a356ff222e9a2f76a81fedaa1c684d5242d274735a1a81317ba8c2cf0c52

(For ppc64le architecture)
The image digest is sha256:c78236afd3fd806533da51d6dc016cca7b92f9e5e78d30a4ea3d5bc44667f5ad

(For aarch64 architecture)
The image digest is sha256:bf8d33c6ccdb2560cb61a4787aedecd645ade9e90c77be86c59653b9f06c474b

All OpenShift Container Platform 4.20 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/4.20/html-single/updating_clusters/index#updating-cluster-cli.

Affected Products

• Red Hat OpenShift Container Platform

Fixes

• BZ - 2428412
• BZ - 2434432
• BZ - 2449833
• BZ - 2453284
• BZ - 2453496
• BZ - 2455470
• BZ - 2457432
• BZ - 2457729
• BZ - 2461606
• BZ - 2461607
• BZ - 2461626
• BZ - 2461629
• BZ - 2461630
• OCPBUGS-74395 - [4.20] HCP KubeVirt Console/Ingress Degraded After Enabling routingViaHost and ipForwarding on Guest Cluster
• OCPBUGS-74918 - [4.20] Operator mirroring creates uncertainty because of tags.
• OCPBUGS-77109 - CPO is missing the UserAgent in the telemetry options when authenticating to Azure Cloud
• OCPBUGS-77170 - Need to install dbus, systemd, and subscription-manager as necessary
• OCPBUGS-77313 - [4.20] Cluster degrades when deleting all three control plane machines simultaneously (regression from 4.17)
• OCPBUGS-77641 - [4.20] linuxptp-daemon ART Dockerfile is missing pciutils
• OCPBUGS-78034 - [4.20] Snapshots of 'disk.csi.azure.com' UltraSSD_LRS PVs periodically exceed the hard coded 10 minute timeout
• OCPBUGS-78439 - vSphere plugin - incorrect handling of settings.
• OCPBUGS-81502 - Authentication operator can't validate ROPC grant flow against ADFS OIDC IdP after cluster have been updated to 4.20.z
• OCPBUGS-82299 - [release-4.20] BMH fails inspecting on SuperMicro ARM GH due to incorrect boot order
• OCPBUGS-83495 - [release-4.20] Developer View Observability Tabs Disappear After OCP 4.20.12 Upgrade
• OCPBUGS-83609 - Bump Kubernetes v1.33.11 to release-4.20
• OCPBUGS-83720 - Internal LoadBalancer fails to create instance groups on multi-subnet GCP clusters
• OCPBUGS-83819 - [release-4.20] False positive for scheduler degradation in Console Control Plane Status caused by user workloads named "scheduler"
• OCPBUGS-84054 - [4.20] UDN DHCP outage on hosted controlplane / hypershift clusters
• OCPBUGS-84124 - Migration from Yarn Classic (v1) to NPM [4.20]
• OCPBUGS-84376 - ironic API port 6385 not accessible via Kubernetes service when using ironic-proxy
• OCPBUGS-84553 - Backport GNR-D BC-without-holdover ZTP configuration to 4.20.z
• OCPBUGS-84890 - Using credHelpers in global pull-secret throws errors during cluster upgrade to OCP 4.20
• OCPBUGS-84962 - [Automated] Update AMI Whitelist
• OCPBUGS-85069 - New node provisioning fails during upgrade rollout and it has been failing at firstboot.
• OCPBUGS-85130 - [release-4.20] Gateway API telemetry should be shipped for usage metering
• OCPBUGS-85204 - [4.20] Fix oc-mirror integration test Dockerfile
• OCPBUGS-85372 - [4.20] e2e: Add irqbalance StartLimitBurst >= 100 config test

CVEs

• CVE-2025-61726
• CVE-2026-22029
• CVE-2026-33186
• CVE-2026-34043
• CVE-2026-34986
• CVE-2026-35469
• CVE-2026-40175
• CVE-2026-42033
• CVE-2026-42035
• CVE-2026-42039
• CVE-2026-42041
• CVE-2026-42043
• CVE-2026-4800

References

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