Red Hat OpenShift 4.19.55 Delivers Security Fixes
Tech GuruQuick Answer
Check OpenShift on Red Hat OpenShift Container Platform 4.19. Upgrade through the supported channel to OpenShift 4.19.55. Verify the completed cluster version, release-image digest, node readiness, operator conditions and representative workload health. Retain upgrade and recovery evidence.
Confirm Scope And Apply The Supported Remediation
What to do now: Record cluster release, architecture, update channel, operator health, workload owners and maintenance constraints. Red Hat OpenShift Container Platform 4.19 clusters requiring this security update. Red Hat recommends the updated packages and images when available in the appropriate release channel; the advisory does not provide a universal lower affected-version boundary. Update the cluster to OpenShift 4.19.55 using Red Hat’s supported release channel and upgrade procedure. Verify the architecture-specific release digest in RHSA-2026:95523. Verify the completed cluster version, release-image digest, node readiness, operator conditions and representative workload health. Retain upgrade and recovery evidence.
Last verified: 2026-11-09 UTC. Recheck the authoritative advisory and supported distribution channel before changing production.
Scope And Authority
| Product scope | Red Hat OpenShift Container Platform 4.19; OpenShift |
|---|---|
| Advisory | RHSA-2026:95523 |
| CVEs | CVE-2026-111497, CVE-2026-98432 |
| Authoritative release date | November 9, 2026 at 02:23:43 UTC, from Red Hat CSAF initial_release_date. |
| Authority revision date | Red Hat records the substantive last-updated version at 2026-11-09T02:23:43+00:00. The CSAF generation timestamp is 2026-11-09T02:24:47+00:00; generation alone is not a material advisory revision. |
| Affected versions | Red Hat OpenShift Container Platform 4.19 clusters requiring this security update. Red Hat recommends the updated packages and images when available in the appropriate release channel; the advisory does not provide a universal lower affected-version boundary. |
| Fixed version | 4.19.55 |
| CVSS base score | 9.8 (highest authority-stated CVSS 3.1 base score) |
| CVSS severity | Critical (CVSS); Critical (Red Hat impact) |
| Exploitation status | CISA lists CVE-2026-111497 (Brotli) in KEV, added October 27, 2026, confirming exploitation of that vulnerability. This does not establish exploitation of a particular OpenShift deployment.; no exploitation claim is inferred. |
Authority CVSS by Vulnerability
| CVE-2026-98432 | CVSS 3.1: 9.8 (Critical) |
|---|---|
| CVE-2026-111497 | CVSS 3.1: 8.1 (High) |
What Changed
Red Hat released RHSA-2026:95523 for Red Hat OpenShift Container Platform 4.19, addressing Linux kernel and Brotli vulnerabilities. The supported platform release is 4.19.55.
What To Validate Now
- Inventory. Record cluster release, architecture, update channel, operator health, workload owners and maintenance constraints.
- Establish applicability. Red Hat OpenShift Container Platform 4.19 clusters requiring this security update. Red Hat recommends the updated packages and images when available in the appropriate release channel; the advisory does not provide a universal lower affected-version boundary.
- Remediate. Update the cluster to OpenShift 4.19.55 using Red Hat’s supported release channel and upgrade procedure. Verify the architecture-specific release digest in RHSA-2026:95523.
- Validate. Verify the completed cluster version, release-image digest, node readiness, operator conditions and representative workload health. Retain upgrade and recovery evidence.
- 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
Use the supported cluster update path when offered in the appropriate release channel. Review upgrade prerequisites, workload disruption budgets and architecture-specific image digests; do not replace individual platform containers independently.
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.
Advisory facts are attributed to Red Hat Inc. The linked CSAF content is licensed under CC BY 4.0; TechGeeks operational guidance is summarized for this notice.
