RHSA-2026:1555 - Security Advisory

Topic

Red Hat OpenShift Container Platform release 4.20.13 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 Moderate. 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 4.20.13. See the following advisory for the RPM packages for this release:

https://access.redhat.com/errata/RHBA-2026:1547

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):

• github.com/sirupsen/logrus: github.com/sirupsen/logrus: Denial-of-Service due to large single-line payload (CVE-2025-65637)

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 sha256:280ffe256696c1b3699a5d0bc9c520b785a0c6acff0ed58073adbd206185c4b9

(For s390x architecture)
The image digest is sha256:22d4a3db37e1ff38ae558e33c357ad304b1bcf065279f86346818f503a5491b7

(For ppc64le architecture)
The image digest is sha256:691b9965559dd7a6e9f0614661d1c33b1c1dc720ddc6a1fca1a53013a80d8358

(For aarch64 architecture)
The image digest is sha256:666514b9f977331a03bb69a3c62427d846175ba3fc032e22895ff496acefff8c

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.

Fixes

• BZ - 2418900
• OCPBUGS-67187 - Backport GNR-D ptp-operator changes
• OCPBUGS-67188 - Backport GNR-D linuxptp-daemon changes to 4.20
• OCPBUGS-72395 - [release-4.20]Unrevert TLS 1.3 / Modern profile tests #29611 with fixes
• OCPBUGS-72417 - [release-4.20] Operator catalog items not visible to console
• OCPBUGS-73681 - Azure installation fail when v-net subnets are pre-configured.
• OCPBUGS-73737 - [release-4.20] Multus: error getting k8s client: host must be a URL or a host:port pair: "https://[10.43.0.1]:443"
• OCPBUGS-73876 - 10m catalog sync interval contributes to unbounded etcd growth
• OCPBUGS-73884 - Admin-ack for Sigstore signature requirements for 4.20-4.21 updates
• OCPBUGS-74132 - [4.20] oauth-proxy e2e tests fail due to ambiguous container image short names on RHEL 9
• OCPBUGS-74226 - machine-api-provider-openstack fails to delete primary NIC before delete instance
• OCPBUGS-74298 - bootstrap-e2e permafailing
• OCPBUGS-74410 - update to Multi-arch compatible image

CVEs

• CVE-2025-65637

References

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