ESB-2026.4694

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.4694 OpenShift Container Platform 4.18.40 bug fix and security update 7 May 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: OpenShift Container Platform 4.18.40 Publisher: Red Hat Operating System: Red Hat Resolution: Patch/Upgrade CVE Names: CVE-2025-61731 Original Bulletin: https://access.redhat.com/errata/RHSA-2026:13736 Comment: CVSS (Max): 8.6 CVE-2025-61731 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H) CVSS Source: Red Hat Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H EPSS (Max): 0.0% (1st) CVE-2025-61731 2026-05-06 - --------------------------BEGIN INCLUDED TEXT-------------------- RHSA-2026:13736 - Security Advisory Issued: 2026-05-06 Updated: 2026-05-06 Synopsis OpenShift Container Platform 4.18.40 bug fix and security update Type/Severity Security Advisory: Important Topic Red Hat OpenShift Container Platform release 4.18.40 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 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 4.18.40. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/RHBA-2026:13726 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/ 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:b2e85618a5a68065589d092f1894e1327e30615333ec315039aadb7908266ad4 (For s390x architecture) The image digest is sha256:37e5d96fdc1609c79a261eb7c497f70492c22e997878efd526f18eaf044a1725 (For ppc64le architecture) The image digest is sha256:867fc0077c615f7bcfd8679a9dd5376b25f7150444ea34ff5e6953e8b477b9df (For aarch64 architecture) The image digest is sha256:e578856046a41e3d6ca9a4c95b5151491cd052e29780096f42cde0b33d5f4112 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 o BZ - 2434433 o OCPBUGS-74407 - [4.18] Unable to provision NVIDIA DGX B200 nodes via ACM, Redfish VirtualMedia InsertMedia request fails with missing UserName/ Password parameters o OCPBUGS-76963 - [release-4.18] Extend the timeout of crictl cmd o OCPBUGS-78776 - [release-4.18] Etcd Operator should attempt to scale down replicas in the same AZ first o OCPBUGS-81479 - [4.18] - Application pods traffic is dropped during the kube-apiserver rollout o OCPBUGS-81556 - [4.18] vsphere-problem-detector-operator crash due to concurrent map writes o OCPBUGS-82148 - [4.18] UDN service flows on br-ex are not correctly considering ip family o OCPBUGS-83872 - Stronger warnings for ClusterVersion force and rollbacks CVEs o CVE-2025-61731 References o https://access.redhat.com/security/updates/classification/ - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. 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