Red Hat Security Advisory: OpenShift Container Platform 4.21.1 packages 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 RPM packages for Red Hat OpenShift Container Platform 4.21.1. See the following advisory for the container images for this release: https://access.redhat.com/errata/RHSA-2026:2129 Security Fix(es): * golang: archive/tar: Unbounded allocation when parsing GNU sparse map (CVE-2025-58183) 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 4.21 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/4.21/html-single/updating_clusters/index#updating-cluster-cli.
AI Analysis
Technical Summary
CVE-2025-58183 is a vulnerability in the golang archive/tar package where unbounded memory allocation occurs when parsing GNU sparse map files. This can cause excessive memory consumption potentially leading to denial of service conditions. The issue affects Red Hat OpenShift Container Platform 4.14 and multiple Red Hat Enterprise Linux versions and related components such as skopeo and go-toolset. Red Hat has issued security advisories and updated RPM packages to remediate the vulnerability. The fix is included in OpenShift Container Platform 4.14.63 and in updated golang packages for Red Hat Enterprise Linux 9.2, 9.6, 10.0, and related variants. No active exploitation has been reported.
Potential Impact
The vulnerability allows unbounded memory allocation during parsing of GNU sparse map files in the golang archive/tar package, which could lead to resource exhaustion and denial of service on affected systems. There is no indication of code execution or data corruption. No known exploits are currently reported in the wild.
Mitigation Recommendations
Red Hat has released official security updates that fix this vulnerability. Users of Red Hat OpenShift Container Platform 4.14 and affected Red Hat Enterprise Linux versions should upgrade to the updated packages (e.g., OpenShift Container Platform 4.14.63 and golang 1.25.3-1.el9_6 or later) as soon as they are available via the appropriate release channels. Instructions for upgrading are provided by Red Hat. No additional mitigations are required beyond applying these official updates.
Red Hat Security Advisory: OpenShift Container Platform 4.21.1 packages 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 RPM packages for Red Hat OpenShift Container Platform 4.21.1. See the following advisory for the container images for this release: https://access.redhat.com/errata/RHSA-2026:2129 Security Fix(es): * golang: archive/tar: Unbounded allocation when parsing GNU sparse map (CVE-2025-58183) 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 4.21 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/4.21/html-single/updating_clusters/index#updating-cluster-cli.
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-58183 is a vulnerability in the golang archive/tar package where unbounded memory allocation occurs when parsing GNU sparse map files. This can cause excessive memory consumption potentially leading to denial of service conditions. The issue affects Red Hat OpenShift Container Platform 4.14 and multiple Red Hat Enterprise Linux versions and related components such as skopeo and go-toolset. Red Hat has issued security advisories and updated RPM packages to remediate the vulnerability. The fix is included in OpenShift Container Platform 4.14.63 and in updated golang packages for Red Hat Enterprise Linux 9.2, 9.6, 10.0, and related variants. No active exploitation has been reported.
Potential Impact
The vulnerability allows unbounded memory allocation during parsing of GNU sparse map files in the golang archive/tar package, which could lead to resource exhaustion and denial of service on affected systems. There is no indication of code execution or data corruption. No known exploits are currently reported in the wild.
Mitigation Recommendations
Red Hat has released official security updates that fix this vulnerability. Users of Red Hat OpenShift Container Platform 4.14 and affected Red Hat Enterprise Linux versions should upgrade to the updated packages (e.g., OpenShift Container Platform 4.14.63 and golang 1.25.3-1.el9_6 or later) as soon as they are available via the appropriate release channels. Instructions for upgrading are provided by Red Hat. No additional mitigations are required beyond applying these 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-2026:5086
- Cve Count
- 1
- State
- PUBLISHED
Threat ID: 6a160976e29bf47b506411aa
Added to database: 05/26/2026, 20:58:30 UTC
Last enriched: 08/14/2026, 23:02:07 UTC
Last updated: 09/13/2026, 01:23:49 UTC
Views: 68
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