RHSA-2026:21655HighCVSS 7.5

Red Hat Security Advisory: OpenShift Container Platform 4.18.43 packages and security update

Published
June 3, 2026
Last Modified
October 12, 2026

🔗 CVE IDs covered (2)

CVE-2026-32280 →CVE-2026-25679 →

📋 Description

CVE-2026-25679 — net/url: Incorrect parsing of IPv6 host literals in net/url CVE-2026-32280 — crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building

🎯 Affected products150

  • Red Hat OpenShift Container Platform 4.18
  • containernetworking-plugins-1:1.4.0-9.rhaos4.18.el8.aarch64 as a component of Red Hat OpenShift Container Platform 4.18
  • containernetworking-plugins-1:1.4.0-9.rhaos4.18.el8.ppc64le as a component of Red Hat OpenShift Container Platform 4.18
  • containernetworking-plugins-1:1.4.0-9.rhaos4.18.el8.s390x as a component of Red Hat OpenShift Container Platform 4.18
  • containernetworking-plugins-1:1.4.0-9.rhaos4.18.el8.src as a component of Red Hat OpenShift Container Platform 4.18
  • containernetworking-plugins-1:1.4.0-9.rhaos4.18.el8.x86_64 as a component of Red Hat OpenShift Container Platform 4.18
  • containernetworking-plugins-debuginfo-1:1.4.0-9.rhaos4.18.el8.aarch64 as a component of Red Hat OpenShift Container Platform 4.18
  • containernetworking-plugins-debuginfo-1:1.4.0-9.rhaos4.18.el8.ppc64le as a component of Red Hat OpenShift Container Platform 4.18
  • containernetworking-plugins-debuginfo-1:1.4.0-9.rhaos4.18.el8.s390x as a component of Red Hat OpenShift Container Platform 4.18
  • containernetworking-plugins-debuginfo-1:1.4.0-9.rhaos4.18.el8.x86_64 as a component of Red Hat OpenShift Container Platform 4.18
  • containernetworking-plugins-debugsource-1:1.4.0-9.rhaos4.18.el8.aarch64 as a component of Red Hat OpenShift Container Platform 4.18
  • containernetworking-plugins-debugsource-1:1.4.0-9.rhaos4.18.el8.ppc64le as a component of Red Hat OpenShift Container Platform 4.18
  • containernetworking-plugins-debugsource-1:1.4.0-9.rhaos4.18.el8.s390x as a component of Red Hat OpenShift Container Platform 4.18
  • containernetworking-plugins-debugsource-1:1.4.0-9.rhaos4.18.el8.x86_64 as a component of Red Hat OpenShift Container Platform 4.18
  • podman-5:5.2.2-12.rhaos4.18.el8.aarch64 as a component of Red Hat OpenShift Container Platform 4.18
  • podman-5:5.2.2-12.rhaos4.18.el8.ppc64le as a component of Red Hat OpenShift Container Platform 4.18
  • podman-5:5.2.2-12.rhaos4.18.el8.s390x as a component of Red Hat OpenShift Container Platform 4.18
  • podman-5:5.2.2-12.rhaos4.18.el8.src as a component of Red Hat OpenShift Container Platform 4.18
  • podman-5:5.2.2-12.rhaos4.18.el8.x86_64 as a component of Red Hat OpenShift Container Platform 4.18
  • podman-5:5.2.2-20.rhaos4.18.el9.aarch64 as a component of Red Hat OpenShift Container Platform 4.18
  • podman-5:5.2.2-20.rhaos4.18.el9.ppc64le as a component of Red Hat OpenShift Container Platform 4.18
  • podman-5:5.2.2-20.rhaos4.18.el9.s390x as a component of Red Hat OpenShift Container Platform 4.18
  • podman-5:5.2.2-20.rhaos4.18.el9.src as a component of Red Hat OpenShift Container Platform 4.18
  • podman-5:5.2.2-20.rhaos4.18.el9.x86_64 as a component of Red Hat OpenShift Container Platform 4.18
  • podman-catatonit-5:5.2.2-12.rhaos4.18.el8.aarch64 as a component of Red Hat OpenShift Container Platform 4.18
  • podman-catatonit-5:5.2.2-12.rhaos4.18.el8.ppc64le as a component of Red Hat OpenShift Container Platform 4.18
  • podman-catatonit-5:5.2.2-12.rhaos4.18.el8.s390x as a component of Red Hat OpenShift Container Platform 4.18
  • podman-catatonit-5:5.2.2-12.rhaos4.18.el8.x86_64 as a component of Red Hat OpenShift Container Platform 4.18
  • podman-catatonit-debuginfo-5:5.2.2-12.rhaos4.18.el8.aarch64 as a component of Red Hat OpenShift Container Platform 4.18
  • podman-catatonit-debuginfo-5:5.2.2-12.rhaos4.18.el8.ppc64le as a component of Red Hat OpenShift Container Platform 4.18
  • +120 more not shown

✅ Remediation

For OpenShift Container Platform 4.18 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.18/html/release_notes/ Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

🔗 References (5)