Red Hat OpenShift 4.21.36 and 4.22.17 Address Ten Vulnerabilities
Tech GuruQuick Answer
Red Hat published RHSA-2026:74384 and RHSA-2026:74430 and RHSA-2026:74383 and RHSA-2026:74429 and RHSA-2026:74427 for Red Hat OpenShift Container Platform 4.21.36 and 4.22.17. Match entitled deployments to the exact advisory relationships, apply OpenShift Container Platform 4.21.36 or 4.22.17 at the advisory-listed packages and immutable image digests, validate dependent operations, and preserve evidence.
Validate OpenShift Container Platform Scope And Apply The Red Hat Fix
What to do now: Inventory Red Hat OpenShift Container Platform 4.21.36 and 4.22.17, confirm the exact entitled branch and installed build or digest, apply the advisory-listed content, validate representative services, and document exceptions.
Last verified: 2026-10-06 UTC. Recheck the authoritative advisory and supported distribution channel before changing production.
Scope And Authority
| Product scope | Red Hat OpenShift Container Platform 4.21.36 and 4.22.17 |
|---|---|
| Advisory | RHSA-2026:74384 / RHSA-2026:74430 / RHSA-2026:74383 / RHSA-2026:74429 / RHSA-2026:74427 |
| CVEs | CVE-2026-27136, CVE-2026-33814, CVE-2026-39821, CVE-2026-49329, CVE-2026-59879, CVE-2026-67213, CVE-2026-83589, CVE-2026-84445, CVE-2026-87114, CVE-2026-96577 |
| Authoritative release date | 2026-10-06 05:38:44 UTC |
| Authority revision date | 2026-10-06 15:13:13 UTC |
| Affected versions | The supported Red Hat OpenShift Container Platform 4.21.36 and 4.22.17 builds identified as affected by the advisory product-status relationships. |
| Fixed version | OpenShift Container Platform 4.21.36 or 4.22.17 at the advisory-listed packages and immutable image digests |
| CVSS base score | 5.3 / 6.1 / 7.1 / 7.5 / 8.1 / 8.2 (CVSS v3.1) |
| CVSS severity | Medium to High |
| Exploitation status | Not stated by the authority; no exploitation claim is inferred. |
What Changed
Red Hat released OpenShift Container Platform 4.21.36 and 4.22.17 core, extras, and package content for ten vulnerabilities across platform components.
What To Validate Now
- Inventory. Locate Red Hat OpenShift Container Platform 4.21.36 and 4.22.17; record the installed build or digest, repository and entitlement, owner, exposure, dependencies, and maintenance group.
- Establish applicability. Compare each deployment with the product and fixed-status relationships in RHSA-2026:74384 and RHSA-2026:74430 and RHSA-2026:74383 and RHSA-2026:74429 and RHSA-2026:74427. Do not infer applicability from a component name or CVSS rating alone.
- Remediate. Apply OpenShift Container Platform 4.21.36 or 4.22.17 at the advisory-listed packages and immutable image digests from the supported Red Hat channel for the exact product branch or architecture.
- Validate. Confirm the resulting package version or immutable digest, exercise representative OpenShift Container Platform services and recovery paths, monitor for regressions, and record the result.
- Retain evidence. Preserve asset and owner identifiers, the applicability decision, before-and-after versions, change approval, installation output, validation results, and any exception or rollback record.
Operational Cautions
Follow the supported OpenShift update graph, preserve cluster state and operator health evidence, use authority-listed digests, and validate control plane, networking, storage, ingress, authentication, and workload scheduling. Preserve pre-change versions or digests, logs, installation output, validation evidence, and rollback decisions.
Evidence To Retain
- Exact product, release stream, package or application version, enabled feature, environment, and accountable owner.
- UTC timestamps, authority revision, approved change record, installer or package-manager output, and resulting version.
- Relevant logs and monitoring evidence, test results, exceptions, compensating controls, and rollback decisions.
Related TechGeeks Resources
Authoritative References
Correction policy: If the authority changes affected versions, fixed versions, severity, exploitation information, mitigations, or required action, TechGeeks will update this notice and its verification date.
