RHSA-2026:3855 - Security Advisory

Sujet

Red Hat OpenShift Container Platform release 4.20.16 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 4.20.16. See the following advisory for the RPM packages for this release:

https://access.redhat.com/errata/RHSA-2026:3851

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 sha256:5e2fb7977a82237e497443e2bb53fd1c196e083fc5095294699399b61ce02746

(For s390x architecture)
The image digest is sha256:dfc309cca8f14d497793502deace618448e55a97686b49793034a16e014a5843

(For ppc64le architecture)
The image digest is sha256:097c91d50e665781b82929c57911fff13b453d1ef3ee1759d84a0ce88da8e03b

(For aarch64 architecture)
The image digest is sha256:665bd6fff9282786782e17b6b70520e798087d06eaa840e0bb37e2ed3a9ac59e

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.

Correctifs

• BZ - 2418900
• BZ - 2430879
• BZ - 2434431
• BZ - 2434432
• BZ - 2434433
• BZ - 2437016
• BZ - 2437111
• OCPBUGS-69645 - MAPO creates events when reconciling machines
• OCPBUGS-73788 - [4.20] UDN service flows on br-ex are not correctly considering ip family
• OCPBUGS-73816 - gnss to ntp failover not triggered by offset spikes
• OCPBUGS-74100 - [OCP 4.20] HCP node CSR not approved in dual stack configuration
• OCPBUGS-74146 - nodeip-configuration not enabled on platform type external
• OCPBUGS-74337 - Cluster Operator kube-scheduler did not report Progressing=True during a cluster update
• OCPBUGS-74546 - CCO pod crashing with nil pointer exception
• OCPBUGS-75912 - [4.20] openshift-cluster-csi-drivers vmware-vsphere-csi-driver-operator-metrics endpoint 8445 port should return 401 instead 500
• OCPBUGS-75931 - HCP cluster upgrade to 4.19 from 4.18.26 creates a service of type loadbalencer with name router, thereby blocking the upgrade
• OCPBUGS-76349 - ovn-ipsec-host creates duplicate openssl attribute
• OCPBUGS-76539 - [4.20] Agent service is failing with input/output error
• OCPBUGS-76630 - The `use-sigstore-attachments` option in the `default.yaml` file is not work
• OCPBUGS-76921 - machine-config-daemon is kill while updating the system-units on the node, leading to disabled system-units after reboot.
• OCPBUGS-76949 - [v2] While mirroring rebuilt catalog with oc-mirror receiving "Instructed to preserve digests" error
• OCPBUGS-76957 - [release-4.20] UnmanagedRoutes alert is firing for managed Routes
• OCPBUGS-77008 - Machine-config controller should not log about non-existent pull-secret changes
• OCPBUGS-77081 - ovnkube failed to start node network controller
• OCPBUGS-77152 - [openshift-4.20] ose-gcp-cloud-controller-manager can't be build hermetically
• OCPBUGS-77181 - mcd_config_drift not working properly
• OCPBUGS-77190 - [release-4.20] Incorrect AlertManagerConfig causing Monitoring operator degraded
• OCPBUGS-77205 - [openshift-4.20] hermetic build failure - ose-ibm-vpc-block-csi-driver
• OCPBUGS-77230 - Remove collect-profiles cronjob from microshift kustomization [4.20]
• OCPBUGS-77238 - Update Konflux references for task-rpms-signature
• OCPBUGS-77272 - Duplicate `prometheusrules.monitoring.coreos.com`
• OCPBUGS-77472 - machine config operator has vsphere password in conditional messages
• OCPBUGS-77488 - OCP 4.20.z: metal3-baremetal-operator pod not honoring NO_PROXY and routing metal3-state service traffic via proxy (works in 4.19.z)
• OCPBUGS-77496 - i-c-c container image contains huge dnf cache

CVE

• CVE-2025-61726
• CVE-2025-61728
• CVE-2025-61731
• CVE-2025-61732
• CVE-2025-65637
• CVE-2025-68121
• CVE-2026-22797

Références

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