Red Hat Security Advisory: OpenShift Container Platform 4.20.12 bug fix and security 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 container images for Red Hat OpenShift Container Platform 4.20.12. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/RHBA-2026:0977 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/openshift_container_platform/4.20/html/release_notes/ Security Fix(es): * qs: qs: Denial of Service via improper input validation in array parsing (CVE-2025-15284) 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 4.20 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/openshift_container_platform/4.20/html-single/updating_clusters/index#updating-cluster-cli.
AI Analysis
Technical Summary
CVE-2025-15284 is a denial-of-service vulnerability in the qs module, which parses query strings in Red Hat OpenShift Container Platform. The flaw arises from improper input validation that allows attackers to bypass the arrayLimit option by using bracket notation (e.g., a[]=value) in HTTP requests. This bypass leads to unbounded memory allocation, causing resource exhaustion and potentially crashing or making the application unresponsive. The vulnerability is rated Important by Red Hat and affects versions prior to 4.21.1 of OpenShift Container Platform. The vendor has released OpenShift Container Platform 4.21.1 with updated container images and packages to address this and other security issues.
Potential Impact
Successful exploitation of CVE-2025-15284 can cause memory exhaustion on affected systems, resulting in denial of service by crashing the application or making it unresponsive. This impacts availability of the OpenShift Container Platform services that rely on the vulnerable qs module for query string parsing. No confidentiality or integrity impacts are reported. The vulnerability affects on-premise or private cloud deployments of OpenShift Container Platform versions prior to 4.21.1.
Mitigation Recommendations
Red Hat has released OpenShift Container Platform 4.21.1 containing updated container images and packages that fix CVE-2025-15284 and other vulnerabilities. Users are strongly advised to upgrade to version 4.21.1 using the OpenShift CLI (oc) or web console following official upgrade instructions. Currently, no effective mitigations meeting Red Hat's criteria are available other than upgrading. Monitoring for updates and applying them promptly is recommended.
Red Hat Security Advisory: OpenShift Container Platform 4.20.12 bug fix and security update
Description
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 4.20.12. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/RHBA-2026:0977 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/openshift_container_platform/4.20/html/release_notes/ Security Fix(es): * qs: qs: Denial of Service via improper input validation in array parsing (CVE-2025-15284) 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 4.20 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/openshift_container_platform/4.20/html-single/updating_clusters/index#updating-cluster-cli.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-15284 is a denial-of-service vulnerability in the qs module, which parses query strings in Red Hat OpenShift Container Platform. The flaw arises from improper input validation that allows attackers to bypass the arrayLimit option by using bracket notation (e.g., a[]=value) in HTTP requests. This bypass leads to unbounded memory allocation, causing resource exhaustion and potentially crashing or making the application unresponsive. The vulnerability is rated Important by Red Hat and affects versions prior to 4.21.1 of OpenShift Container Platform. The vendor has released OpenShift Container Platform 4.21.1 with updated container images and packages to address this and other security issues.
Potential Impact
Successful exploitation of CVE-2025-15284 can cause memory exhaustion on affected systems, resulting in denial of service by crashing the application or making it unresponsive. This impacts availability of the OpenShift Container Platform services that rely on the vulnerable qs module for query string parsing. No confidentiality or integrity impacts are reported. The vulnerability affects on-premise or private cloud deployments of OpenShift Container Platform versions prior to 4.21.1.
Mitigation Recommendations
Red Hat has released OpenShift Container Platform 4.21.1 containing updated container images and packages that fix CVE-2025-15284 and other vulnerabilities. Users are strongly advised to upgrade to version 4.21.1 using the OpenShift CLI (oc) or web console following official upgrade instructions. Currently, no effective mitigations meeting Red Hat's criteria are available other than upgrading. Monitoring for updates and applying them promptly is recommended.
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"]
Threat ID: 6a160977e29bf47b5064389d
Added to database: 05/26/2026, 20:58:31 UTC
Last enriched: 08/15/2026, 00:17:20 UTC
Last updated: 09/10/2026, 19:36:49 UTC
Views: 140
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