RHSA-2026:2130 - Security Advisory

Topic

Red Hat OpenShift Container Platform release 4.21.1 is now available with updates to packages and images that fix several bugs.

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 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 RPM packages for Red Hat OpenShift Container Platform 4.21.1. See the following advisory for the container images for this release:

https://access.redhat.com/errata/RHSA-2026:2129

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 4.21 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.

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/

Fixes

• BZ - 2418900
• OCPBUGS-45980 - Multi-NetworkPolicy IPBlock definition with pod & namespace selector
• OCPBUGS-57269 - local-storage-operator.v4.18.0-202505271635 missing operators.openshift.io/must-gather-image despite CSV defines - name: MUSTGATHER_IMAGE value: registry.redhat.io/openshift4/ose-local-storage-mustgather-rhel9@sha256
• OCPBUGS-59631 - NetworkAttachmentDefinition ownerReference field removed after SriovNetwork Update
• OCPBUGS-61434 - Make substitutions work for 4.21 in manifests of local-storage-operator
• OCPBUGS-61452 - Make substitutions work for 4.21 in manifests of sriov-network-operator
• OCPBUGS-61932 - cloud-event-proxy: ptp sidecar is spamming error msg="Interface does not match Intel or Mellanox naming format, using original interface name"
• OCPBUGS-61939 - cloud-event-proxy: Sidecar is calling GetAlias more often than necessary
• OCPBUGS-61988 - LocalVolumeSet cannot filter out non-unique '/dev/disk/by-id' references
• OCPBUGS-62089 - sriov webhook doesn't reload tls cert when secret changes
• OCPBUGS-62323 - NFD prune on delete cause error
• OCPBUGS-62718 - [OCP][Container][SR-IOV] CNI plugin type="sriov" name="sriov-net" failed (add): failed to settle addresses for "eth0": link eth0 still has tentative addresses after 5000000000 seconds
• OCPBUGS-63087 - RHCOS10: SR-IOV Operator does not work
• OCPBUGS-63435 - GNSS Sync State Not Correctly Mapped to Cloud Event and Metrics
• OCPBUGS-65711 - SR-IOV: Entrypoint scripts fail to start operator in OKD when deployed using RHEL10
• OCPBUGS-66895 - LSO - references in CSV must use pullspecs declared in image-references file
• OCPBUGS-69869 - Revert NetworkPolicies for LSO (OLM-managed)
• BZ - 2418900
• OCPBUGS-45980 - Multi-NetworkPolicy IPBlock definition with pod & namespace selector
• OCPBUGS-57269 - local-storage-operator.v4.18.0-202505271635 missing operators.openshift.io/must-gather-image despite CSV defines - name: MUSTGATHER_IMAGE value: registry.redhat.io/openshift4/ose-local-storage-mustgather-rhel9@sha256
• OCPBUGS-59631 - NetworkAttachmentDefinition ownerReference field removed after SriovNetwork Update
• OCPBUGS-61434 - Make substitutions work for 4.21 in manifests of local-storage-operator
• OCPBUGS-61452 - Make substitutions work for 4.21 in manifests of sriov-network-operator
• OCPBUGS-61932 - cloud-event-proxy: ptp sidecar is spamming error msg="Interface does not match Intel or Mellanox naming format, using original interface name"
• OCPBUGS-61939 - cloud-event-proxy: Sidecar is calling GetAlias more often than necessary
• OCPBUGS-61988 - LocalVolumeSet cannot filter out non-unique '/dev/disk/by-id' references
• OCPBUGS-62089 - sriov webhook doesn't reload tls cert when secret changes
• OCPBUGS-62323 - NFD prune on delete cause error
• OCPBUGS-62718 - [OCP][Container][SR-IOV] CNI plugin type="sriov" name="sriov-net" failed (add): failed to settle addresses for "eth0": link eth0 still has tentative addresses after 5000000000 seconds
• OCPBUGS-63087 - RHCOS10: SR-IOV Operator does not work
• OCPBUGS-63435 - GNSS Sync State Not Correctly Mapped to Cloud Event and Metrics
• OCPBUGS-65711 - SR-IOV: Entrypoint scripts fail to start operator in OKD when deployed using RHEL10
• OCPBUGS-66895 - LSO - references in CSV must use pullspecs declared in image-references file
• OCPBUGS-69869 - Revert NetworkPolicies for LSO (OLM-managed)

CVEs

• CVE-2025-65637

References

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