RHSA-2026:27044: OpenShift Container Platform 4.21.21 bug fix and security update
OpenShift Container Platform 4.21.21 bug fix and security update
Other sources
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 4.21.21. See the following advisory for the RPM packages for this release:https://access.redhat.com/errata/RHBA-2026:27041 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/openshiftcontainerplatform/4.21/html/releasenotes/
— Red Hat
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
OpenShift Container Platformto a version that resolves this vulnerability.Fixed in 4.21.21 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Patch RHBA-2026:27041 - Operational
Download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures.
- Operational
Verify the release image digests match the following sha256 values: x86_64: sha256:7224f77afb20aedaf82bfc13ca11699689bd5b06795d6d1740dbd4c265150c44; s390x: sha256:73811451efed403727e561f1ffadc1936c71bbefbae526fcea86a88fe23473f2; ppc64le: sha256:05cb0b4804507c0b5e7923b7c6bcf293bd4e2d0f476c8ec6d13b179eb3157b42; aarch64: sha256:fd193bcd1042c3f17c33e7668d7b9866b915ac07075e6c2e35b0fe396bfd9a51.
- Operational
Check for available updates using the OpenShift CLI (oc) or the OpenShift web console and apply the OpenShift 4.21.21 release from the appropriate release channel.
Event History
Frequently Asked Questions
What is the severity of RHSA-2026:27044?
The severity of RHSA-2026:27044 is high with a rating of 7.
How do I fix RHSA-2026:27044?
To fix RHSA-2026:27044, update to the latest version of Red Hat OpenShift Container Platform as indicated in the advisory.
What does RHSA-2026:27044 address?
RHSA-2026:27044 addresses bug fixes and security updates for the Red Hat OpenShift Container Platform.
What versions are affected by RHSA-2026:27044?
RHSA-2026:27044 affects Red Hat OpenShift Container Platform version 4.21.21.
When was RHSA-2026:27044 published?
RHSA-2026:27044 was published on June 23, 2026.