RHSA-2026:1000 - Security Advisory

Topic

Red Hat OpenShift Container Platform release 4.20.12 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 4.20.12. See the following advisory for the RPM packages for this release:

https://access.redhat.com/errata/RHBA-2026:0977

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/

Security Fix(es):

• qs: qs: Denial of Service via improper input validation in array parsing (CVE-2025-15284)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

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.

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:c9bae4933c711d664e15da5b98e6e057fda51697aef4f3ec8e932922aa969373

(For s390x architecture)
The image digest is sha256:24efd2a05ad0aaff7f303ec7aceef23fbf2495c5bb122a2a177d69d51a18376a

(For ppc64le architecture)
The image digest is sha256:aa79662c0220879c8cde3314199265de32d0b6c420377f7ba9ed322f4657ce1c

(For aarch64 architecture)
The image digest is sha256:be52c63b0a81cb4a29f40f1a4554e6f11874d929d5c1a5f6f5fbcb3869525bf2

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 - 2425946
• OCPBUGS-61314 - Missing default value for maxUnhealthy under machinehealthcheck CR
• OCPBUGS-62721 - E2E: Skip Last Level cache tests on Virtual Machines
• OCPBUGS-63538 - [4.20] Servicing does not work for externallyProvisioned hosts
• OCPBUGS-63751 - [4.20] Improper namespace could affect PPC
• OCPBUGS-67225 - Serverless - Eventing - Brokers and Channels tabs : UI has unwanted semicolon
• OCPBUGS-69670 - [release-4.20] systemd as container init with spc_t breaks configmap mount permissions
• OCPBUGS-69917 - There should be no role ARN field as token-auth-aws/azure/gcp=false in csv annotations
• OCPBUGS-70201 - [4.20] "ulimit -n" should stay 1048576 on 4.20.z upgrades
• OCPBUGS-70349 - [MCO][NTO][API] [release-4.20] Remove all the cgroupv1 references/dead code
• OCPBUGS-71203 - x86 release payload now contains additional ARM ISO
• OCPBUGS-72409 - Portieris is broken with CPOv2
• OCPBUGS-72413 - Evicted pod test failing due to cadvisor metrics outage
• OCPBUGS-72563 - Storage operator should configure kubernetes-k8s Role(Binding) for the openshift-cluster-csi-drivers namespace
• OCPBUGS-72570 - Machine creation is not fully covered during periods of inconsistent response from AWS
• OCPBUGS-72589 - [4.20] kube-state-metrics panic closing nil channel
• OCPBUGS-73365 - CNO fails to start with "host must be a URL or a host:port pair"
• OCPBUGS-73785 - [AWS] Control plane machines are created in wrong zone
• OCPBUGS-73888 - multus: ci/prow/verify-deps keeps failing for 4.20 branch
• OCPBUGS-74081 - Unable to enable systemd service on OCP 4.20
• OCPBUGS-74139 - [release-4.20] Skip _stackmanager check for Libreswan 5.3
• OCPBUGS-74169 - OKD builds fail with invalid GOTOOLCHAIN 'gov1.24.11'
• OCPBUGS-74183 - Unit tests failing with GOOGLE_APPLICATION_CREDENTIALS missing

CVEs

• CVE-2025-15284

References

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