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
CVE-2025-58183 is a vulnerability in the Go archive/tar package where tar.Reader does not limit the number of sparse region data blocks in GNU tar pax 1.0 sparse files. An attacker can craft a tar archive with a large number of sparse regions, causing the Go application to allocate excessive memory, resulting in an out-of-memory condition and denial of service. This affects Red Hat OpenShift Container Platform versions 4.12 through 4.21. Red Hat has issued security updates in OpenShift Container Platform 4.20.24 and related releases to fix this issue.
Potential Impact
The vulnerability can cause denial of service by exhausting memory resources when processing maliciously crafted tar archives. There is no impact on confidentiality or integrity. The severity is rated high by Red Hat due to the potential for service disruption. No known exploits in the wild have been reported.
Mitigation Recommendations
Red Hat has released updated RPM packages and container images for OpenShift Container Platform 4.20.24 and related versions that fix this vulnerability. Users are advised to upgrade to these updated packages and images via the OpenShift CLI or web console as soon as they become available. No alternative mitigations are currently available or meet Red Hat's criteria for ease of use and deployment.
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
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-58183 is a vulnerability in the Go archive/tar package where tar.Reader does not limit the number of sparse region data blocks in GNU tar pax 1.0 sparse files. An attacker can craft a tar archive with a large number of sparse regions, causing the Go application to allocate excessive memory, resulting in an out-of-memory condition and denial of service. This affects Red Hat OpenShift Container Platform versions 4.12 through 4.21. Red Hat has issued security updates in OpenShift Container Platform 4.20.24 and related releases to fix this issue.
Potential Impact
The vulnerability can cause denial of service by exhausting memory resources when processing maliciously crafted tar archives. There is no impact on confidentiality or integrity. The severity is rated high by Red Hat due to the potential for service disruption. No known exploits in the wild have been reported.
Mitigation Recommendations
Red Hat has released updated RPM packages and container images for OpenShift Container Platform 4.20.24 and related versions that fix this vulnerability. Users are advised to upgrade to these updated packages and images via the OpenShift CLI or web console as soon as they become available. No alternative mitigations are currently available or meet Red Hat's criteria for ease of use and deployment.
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"]
- State
- PUBLISHED
Threat ID: 6a160954e29bf47b50619578
Added to database: 05/26/2026, 20:57:56 UTC
Last enriched: 08/14/2026, 21:42:40 UTC
Last updated: 09/14/2026, 22:01:30 UTC
Views: 141
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