Red Hat Security Advisory: OpenShift Container Platform 4.21.1 bug fix and security update
Red Hat OpenShift Container Platform 4. 21. 1 includes multiple security fixes addressing vulnerabilities such as denial of service, HTTP request smuggling, and unbounded memory allocation in various components including Helm, logrus, eventlet, qs, and golang archive/tar. These issues could impact cluster stability and security if exploited. Red Hat has released updated container images and advises all users of OpenShift Container Platform 4. 21 to upgrade to these versions. Detailed upgrade instructions are provided by Red Hat to ensure full remediation of these vulnerabilities.
AI Analysis
Technical Summary
This advisory covers Red Hat OpenShift Container Platform 4.21.1, which contains fixes for six security vulnerabilities: CVE-2025-55199 (Helm Chart JSON Schema Denial of Service), CVE-2025-55198 (Helm YAML Parsing Panic), CVE-2025-65637 (logrus Denial-of-Service via large payload), CVE-2025-58068 (Eventlet HTTP request smuggling), CVE-2025-15284 (qs Denial of Service via improper input validation in array parsing), and CVE-2025-58183 (golang archive/tar unbounded allocation). These vulnerabilities affect components used within the OpenShift platform and could lead to denial of service or other stability issues. Red Hat provides updated container images and RPM packages to address these issues.
Potential Impact
The vulnerabilities addressed in this update primarily enable denial-of-service conditions or parsing errors that could disrupt OpenShift cluster operations. Exploitation could cause service interruptions or crashes in affected components such as Helm, logging libraries, HTTP request handling, and archive processing. No known exploits in the wild have been reported. The overall security impact is rated as Important by Red Hat, indicating significant but not critical risk.
Mitigation Recommendations
Red Hat has released updated container images and RPM packages as part of OpenShift Container Platform 4.21.1 to fix these vulnerabilities. Users of OpenShift Container Platform 4.21 are strongly advised to upgrade to these updated versions through the appropriate release channels using the OpenShift CLI (oc) or web console. Detailed upgrade instructions are available in Red Hat's official documentation. No additional mitigations are indicated beyond applying the official updates.
Red Hat Security Advisory: OpenShift Container Platform 4.21.1 bug fix and security update
Description
Red Hat OpenShift Container Platform 4. 21. 1 includes multiple security fixes addressing vulnerabilities such as denial of service, HTTP request smuggling, and unbounded memory allocation in various components including Helm, logrus, eventlet, qs, and golang archive/tar. These issues could impact cluster stability and security if exploited. Red Hat has released updated container images and advises all users of OpenShift Container Platform 4. 21 to upgrade to these versions. Detailed upgrade instructions are provided by Red Hat to ensure full remediation of these vulnerabilities.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers Red Hat OpenShift Container Platform 4.21.1, which contains fixes for six security vulnerabilities: CVE-2025-55199 (Helm Chart JSON Schema Denial of Service), CVE-2025-55198 (Helm YAML Parsing Panic), CVE-2025-65637 (logrus Denial-of-Service via large payload), CVE-2025-58068 (Eventlet HTTP request smuggling), CVE-2025-15284 (qs Denial of Service via improper input validation in array parsing), and CVE-2025-58183 (golang archive/tar unbounded allocation). These vulnerabilities affect components used within the OpenShift platform and could lead to denial of service or other stability issues. Red Hat provides updated container images and RPM packages to address these issues.
Potential Impact
The vulnerabilities addressed in this update primarily enable denial-of-service conditions or parsing errors that could disrupt OpenShift cluster operations. Exploitation could cause service interruptions or crashes in affected components such as Helm, logging libraries, HTTP request handling, and archive processing. No known exploits in the wild have been reported. The overall security impact is rated as Important by Red Hat, indicating significant but not critical risk.
Mitigation Recommendations
Red Hat has released updated container images and RPM packages as part of OpenShift Container Platform 4.21.1 to fix these vulnerabilities. Users of OpenShift Container Platform 4.21 are strongly advised to upgrade to these updated versions through the appropriate release channels using the OpenShift CLI (oc) or web console. Detailed upgrade instructions are available in Red Hat's official documentation. No additional mitigations are indicated beyond applying the official updates.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:2129
- Cve Count
- 6
- Additional Cves
- ["CVE-2025-55198","CVE-2025-55199","CVE-2025-58068","CVE-2025-58183","CVE-2025-65637"]
- Cvss Version
- null
Threat ID: 6a160977e29bf47b5064389d
Added to database: 5/26/2026, 8:58:31 PM
Last enriched: 5/26/2026, 10:15:18 PM
Last updated: 5/27/2026, 4:48:14 AM
Views: 2
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