RHSA-2026:56855: OpenShift Container Platform 4.16.69 security and extras update
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 4.16.69. See the following advisory for the container images for this release:https://access.redhat.com/errata/RHSA-2026:56854 Security Fix(es): crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building (CVE-2026-32280) net: golang: Go net package: Denial of Service via long CNAME response in LookupCNAME (CVE-2026-33811) crypto/tls: crypto/tls: Incorrect certificate validation during TLS session resumption (CVE-2025-68121) 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 4.16 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/openshiftcontainerplatform/4.16/html-single/updatingclusters/index#updating-cluster-cli.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Red Hat OpenShift Container Platform 4.16to a version that resolves this vulnerability.Fixed in 4.16.69 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Patch RHSA-2026:56854
Event History
Frequently Asked Questions
Which OpenShift environments should be prioritized for this update?
All Red Hat OpenShift Container Platform 4.16 users are advised to upgrade to the updated packages and images when they are available through the appropriate release channel.
Are container images included in this advisory?
This advisory contains RPM packages for OpenShift Container Platform 4.16.69. The corresponding container images are provided in RHSA-2026:56854, so both package and image updates should be considered.
How can administrators determine whether the update is available for their cluster?
Check for available updates using the OpenShift CLI (oc) or the web console.
What security issues are addressed by the update?
The update addresses denial-of-service issues in Go certificate-chain building and LookupCNAME handling, plus incorrect certificate validation during TLS session resumption.