Red Hat Security Advisory: OpenShift Container Platform 4.20.10 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 4.20.10. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/157897 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): * bind: Resource exhaustion via malformed DNSKEY handling (CVE-2025-8677) * bind: Cache poisoning attacks with unsolicited RRs (CVE-2025-40778) * bind: Cache poisoning due to weak PRNG (CVE-2025-40780) * expat: libexpat in Expat allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing (CVE-2025-59375) * openssl: Out-of-bounds read & write in RFC 3211 KEK Unwrap (CVE-2025-9230) 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
This advisory covers security updates in Red Hat OpenShift Container Platform 4.20.10, which fixes five vulnerabilities: CVE-2025-8677 (bind resource exhaustion via malformed DNSKEY handling), CVE-2025-40778 (bind cache poisoning with unsolicited resource records), CVE-2025-40780 (bind cache poisoning due to weak PRNG), CVE-2025-59375 (libexpat allows large dynamic memory allocations via small XML documents), and CVE-2025-9230 (openssl out-of-bounds read and write in RFC 3211 KEK Unwrap). These vulnerabilities affect the OpenShift Container Platform 4.20 release series prior to 4.20.10. The advisory recommends upgrading to 4.20.10, which contains updated container images and RPM packages that address these issues. The vendor provides detailed upgrade instructions and image digests for multiple architectures.
Potential Impact
The vulnerabilities fixed in this update could allow attackers to cause resource exhaustion, perform cache poisoning attacks, trigger large memory allocations, or cause out-of-bounds memory access, potentially leading to denial of service or other security impacts. The advisory rates the security impact as Important (high severity). No known exploits in the wild have been reported at this time.
Mitigation Recommendations
A fix is available in Red Hat OpenShift Container Platform version 4.20.10. Users should upgrade to this version using the OpenShift CLI (oc) or web console as soon as the updated packages and images are available in their release channel. Detailed upgrade instructions are provided by Red Hat. No additional mitigations are specified beyond applying the official update.
Red Hat Security Advisory: OpenShift Container Platform 4.20.10 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 4.20.10. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/157897 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): * bind: Resource exhaustion via malformed DNSKEY handling (CVE-2025-8677) * bind: Cache poisoning attacks with unsolicited RRs (CVE-2025-40778) * bind: Cache poisoning due to weak PRNG (CVE-2025-40780) * expat: libexpat in Expat allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing (CVE-2025-59375) * openssl: Out-of-bounds read & write in RFC 3211 KEK Unwrap (CVE-2025-9230) 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
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers security updates in Red Hat OpenShift Container Platform 4.20.10, which fixes five vulnerabilities: CVE-2025-8677 (bind resource exhaustion via malformed DNSKEY handling), CVE-2025-40778 (bind cache poisoning with unsolicited resource records), CVE-2025-40780 (bind cache poisoning due to weak PRNG), CVE-2025-59375 (libexpat allows large dynamic memory allocations via small XML documents), and CVE-2025-9230 (openssl out-of-bounds read and write in RFC 3211 KEK Unwrap). These vulnerabilities affect the OpenShift Container Platform 4.20 release series prior to 4.20.10. The advisory recommends upgrading to 4.20.10, which contains updated container images and RPM packages that address these issues. The vendor provides detailed upgrade instructions and image digests for multiple architectures.
Potential Impact
The vulnerabilities fixed in this update could allow attackers to cause resource exhaustion, perform cache poisoning attacks, trigger large memory allocations, or cause out-of-bounds memory access, potentially leading to denial of service or other security impacts. The advisory rates the security impact as Important (high severity). No known exploits in the wild have been reported at this time.
Mitigation Recommendations
A fix is available in Red Hat OpenShift Container Platform version 4.20.10. Users should upgrade to this version using the OpenShift CLI (oc) or web console as soon as the updated packages and images are available in their release channel. Detailed upgrade instructions are provided by Red Hat. No additional mitigations are specified beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:0420
- Cve Count
- 5
- Additional Cves
- ["CVE-2025-9230","CVE-2025-40778","CVE-2025-40780","CVE-2025-59375"]
Threat ID: 6a175eefe29bf47b50eddd33
Added to database: 05/27/2026, 21:15:27 UTC
Last enriched: 08/16/2026, 18:30:13 UTC
Last updated: 09/10/2026, 19:36:52 UTC
Views: 167
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