Red Hat Security Advisory: OpenShift Container Platform 4.20.18 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 4.20.18. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/RHBA-2026:6559 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/
AI Analysis
Technical Summary
The advisory addresses CVE-2025-58183, a vulnerability in the golang archive/tar package used by Red Hat OpenShift Container Platform 4.20.24. The flaw involves unbounded memory allocation when parsing GNU sparse map files, which can potentially lead to resource exhaustion. Red Hat has released updated RPM packages and container images for OpenShift Container Platform 4.20.24 that fix this issue. The vendor rates the security impact as moderate and recommends upgrading to the updated packages and images. The advisory includes instructions for upgrading clusters and references additional CVEs fixed in this release.
Potential Impact
The vulnerability allows unbounded memory allocation during parsing of GNU sparse map files, which can lead to resource exhaustion on affected systems running OpenShift Container Platform 4.20. This may affect system stability and availability. No known exploits in the wild have been reported. The security impact is rated as moderate by Red Hat Product Security.
Mitigation Recommendations
Red Hat has released updated RPM packages and container images for OpenShift Container Platform 4.20.24 that address this vulnerability. Users should upgrade to these updated packages and images as soon as they are available in the appropriate release channels. Upgrades can be performed using the OpenShift CLI (oc) or the web console. Detailed upgrade instructions are available in Red Hat's official documentation. Since this is an official fix, applying the update fully mitigates the vulnerability.
Red Hat Security Advisory: OpenShift Container Platform 4.20.18 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 4.20.18. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/RHBA-2026:6559 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/
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The advisory addresses CVE-2025-58183, a vulnerability in the golang archive/tar package used by Red Hat OpenShift Container Platform 4.20.24. The flaw involves unbounded memory allocation when parsing GNU sparse map files, which can potentially lead to resource exhaustion. Red Hat has released updated RPM packages and container images for OpenShift Container Platform 4.20.24 that fix this issue. The vendor rates the security impact as moderate and recommends upgrading to the updated packages and images. The advisory includes instructions for upgrading clusters and references additional CVEs fixed in this release.
Potential Impact
The vulnerability allows unbounded memory allocation during parsing of GNU sparse map files, which can lead to resource exhaustion on affected systems running OpenShift Container Platform 4.20. This may affect system stability and availability. No known exploits in the wild have been reported. The security impact is rated as moderate by Red Hat Product Security.
Mitigation Recommendations
Red Hat has released updated RPM packages and container images for OpenShift Container Platform 4.20.24 that address this vulnerability. Users should upgrade to these updated packages and images as soon as they are available in the appropriate release channels. Upgrades can be performed using the OpenShift CLI (oc) or the web console. Detailed upgrade instructions are available in Red Hat's official documentation. Since this is an official fix, applying the update fully mitigates the vulnerability.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:6564
- Cve Count
- 6
- Additional Cves
- ["CVE-2025-61726","CVE-2025-61728","CVE-2026-22028","CVE-2026-25679","CVE-2026-33186"]
- Cvss Version
- null
Threat ID: 6a160954e29bf47b50619578
Added to database: 05/26/2026, 20:57:56 UTC
Last enriched: 07/30/2026, 12:32:15 UTC
Last updated: 07/31/2026, 19:30:08 UTC
Views: 120
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.