RHSA-2026:0338 - Security Advisory

Topic

Red Hat OpenShift Container Platform release 4.18.31 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 4.18.

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

https://access.redhat.com/errata/RHSA-2026:0331

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/4.18/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 4.18 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/4.18/html-single/updating_clusters/index#updating-cluster-cli.

Solution

For OpenShift Container Platform 4.18 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/4.18/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 sha256:64e8c4cbd3199beb1ebb8d6a208cb81fdfe62f4e52d7586033f534d35f981244

(For s390x architecture)
The image digest is sha256:5b964fa43873a20a66b95769bbcd6c31b028f505281fb045bb3c2ed6ca114e91

(For ppc64le architecture)
The image digest is sha256:2108325c5ee08249e1b0c0ad6a3daab197f5e2a1a83c8600d27c49ad0ff94307

(For aarch64 architecture)
The image digest is sha256:b465cef295a81eaf055c87a9af6d8ecdcc11cb1e898895d6df527eb155a7ff82

All OpenShift Container Platform 4.18 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/4.18/html-single/updating_clusters/index#updating-cluster-cli.

Fixes

• BZ - 2418900
• OCPBUGS-52659 - Azure: cannot use nvme/scsi VM (such as dxv6) instances
• OCPBUGS-55470 - [build] Ensure Git Clone Does Not Run Privileged
• OCPBUGS-63494 - Panic error during the destruction of an OpenShift 4.18 on GCP using the OpenShift installer
• OCPBUGS-66140 - deleted nodes still present in egressfirewalls managed fields
• OCPBUGS-66182 - [release-4.18] [QEMUKubeVirtLauncherLogs]The VM pod that doesn't deliver any logs blocks the QEMU gathering
• OCPBUGS-66381 - [release-4.18] Packets not being forwarded from pod to edge interface (OVS_DROP_LAST_ACTION)
• OCPBUGS-66396 - [release-4.18] [QEMUKubeVirtLauncherLogs]The logs from error QEMU pod were not gathered
• OCPBUGS-67168 - [4.18] Backport of MTV telemetry MON-3940
• OCPBUGS-67286 - ose-ibmcloud-cluster-api-controllers can't be built hermetically due to incomplete vendor/
• OCPBUGS-68347 - Add ricky-rav to OWNERS for release-4.18, release-4.17, release-4.16
• OCPBUGS-68360 - [4.18] Test advertised ip reachability before assigning it
• OCPBUGS-68361 - Duplicate Pipelines nav option in console side navigation
• OCPBUGS-69847 - network-dependent unit tests for image metadata causing failures
• OCPBUGS-69900 - PPC64le upgrades have gotten 80+ minutes
• OCPBUGS-70002 - Update builder image to golang version to 1.23
• OCPBUGS-70315 - [release-4.18] OCP 4.16.43 - HAProxy MaxConn Limit reached/exceeded after upgrade from 4.14 with no change to workload

CVEs

• CVE-2025-65637

References

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