RHSA-2026:54552: Important: OpenShift Container Platform 4.19.43 packages and security update

Published Aug 19, 2026
·
Updated

Red Hat OpenShift Container Platform is Red Hat's cloud computingKubernetes application platform solution designed for on-premise or privatecloud deployments.This advisory contains the RPM packages for Red Hat OpenShift ContainerPlatform 4.19.43. See the following advisory for the container images forthis release:https://access.redhat.com/errata/RHSA-2026:54555 Security Fix(es): net: golang: Go net package: Denial of Service via long CNAME response in LookupCNAME (CVE-2026-33811) net/mail: golang: Go net/mail: Denial of Service via crafted email inputs (CVE-2026-39820) net/mail: golang: net/mail: Denial of Service via pathological email address parsing (CVE-2026-42499)For more details about the security issue(s), including the impact, a CVSSscore, acknowledgments, and other related information, refer to the CVEpage(s) listed in the References section.All OpenShift Container Platform 4.19 users are advised to upgrade to theseupdated packages and images when they are available in the appropriaterelease channel. To check for available updates, use the OpenShift CLI (oc)or web console. Instructions for upgrading a cluster are available athttps://docs.redhat.com/en/documentation/openshiftcontainerplatform/4.19/html-single/updatingclusters/index#updating-cluster-cli.

Affected Software

75 affected componentsFixes available
redhat/cri-o<1.32.13-9.rhaos4.19.git2100f27.el9
1.32.13-9.rhaos4.19.git2100f27.el9
redhat/cri-tools<1.32.0-6.el9
1.32.0-6.el9
redhat/openshift<4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
redhat/openshift-clients<4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el9
4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el9
redhat/ose-aws-ecr-image-credential-provider<4.19.0-202608111604.p2.g425c1c5.assembly.stream.el9
4.19.0-202608111604.p2.g425c1c5.assembly.stream.el9
redhat/skopeo<1.18.1-7.rhaos4.19.el9
1.18.1-7.rhaos4.19.el9
redhat/cri-o<1.32.13-9.rhaos4.19.git2100f27.el9
1.32.13-9.rhaos4.19.git2100f27.el9
redhat/cri-o-debuginfo<1.32.13-9.rhaos4.19.git2100f27.el9
1.32.13-9.rhaos4.19.git2100f27.el9
redhat/cri-o-debugsource<1.32.13-9.rhaos4.19.git2100f27.el9
1.32.13-9.rhaos4.19.git2100f27.el9
redhat/cri-tools<1.32.0-6.el9
1.32.0-6.el9
redhat/cri-tools-debuginfo<1.32.0-6.el9
1.32.0-6.el9
redhat/cri-tools-debugsource<1.32.0-6.el9
1.32.0-6.el9
redhat/openshift-clients<4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el9
4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el9
redhat/openshift-clients-redistributable<4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el9
4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el9
redhat/openshift-hyperkube<4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
redhat/openshift-kube-apiserver<4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
redhat/openshift-kube-controller-manager<4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
redhat/openshift-kube-scheduler<4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
redhat/openshift-kubelet<4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
redhat/ose-aws-ecr-image-credential-provider<4.19.0-202608111604.p2.g425c1c5.assembly.stream.el9
4.19.0-202608111604.p2.g425c1c5.assembly.stream.el9
redhat/skopeo<1.18.1-7.rhaos4.19.el9
1.18.1-7.rhaos4.19.el9
redhat/skopeo-debuginfo<1.18.1-7.rhaos4.19.el9
1.18.1-7.rhaos4.19.el9
redhat/skopeo-debugsource<1.18.1-7.rhaos4.19.el9
1.18.1-7.rhaos4.19.el9
redhat/skopeo-tests<1.18.1-7.rhaos4.19.el9
1.18.1-7.rhaos4.19.el9
redhat/openshift-clients<4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el8
4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el8
redhat/openshift-clients<4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el8
4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el8
redhat/openshift-clients-redistributable<4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el8
4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el8
redhat/cri-o<1.32.13-9.rhaos4.19.git2100f27.el9
1.32.13-9.rhaos4.19.git2100f27.el9
redhat/cri-o-debuginfo<1.32.13-9.rhaos4.19.git2100f27.el9
1.32.13-9.rhaos4.19.git2100f27.el9
redhat/cri-o-debugsource<1.32.13-9.rhaos4.19.git2100f27.el9
1.32.13-9.rhaos4.19.git2100f27.el9
redhat/cri-tools<1.32.0-6.el9
1.32.0-6.el9
redhat/cri-tools-debuginfo<1.32.0-6.el9
1.32.0-6.el9
redhat/cri-tools-debugsource<1.32.0-6.el9
1.32.0-6.el9
redhat/openshift-clients<4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el9
4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el9
redhat/openshift-hyperkube<4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
redhat/openshift-kube-apiserver<4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
redhat/openshift-kube-controller-manager<4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
redhat/openshift-kube-scheduler<4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
redhat/openshift-kubelet<4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
redhat/ose-aws-ecr-image-credential-provider<4.19.0-202608111604.p2.g425c1c5.assembly.stream.el9
4.19.0-202608111604.p2.g425c1c5.assembly.stream.el9
redhat/skopeo<1.18.1-7.rhaos4.19.el9
1.18.1-7.rhaos4.19.el9
redhat/skopeo-debuginfo<1.18.1-7.rhaos4.19.el9
1.18.1-7.rhaos4.19.el9
redhat/skopeo-debugsource<1.18.1-7.rhaos4.19.el9
1.18.1-7.rhaos4.19.el9
redhat/skopeo-tests<1.18.1-7.rhaos4.19.el9
1.18.1-7.rhaos4.19.el9
redhat/openshift-clients<4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el8
4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el8
redhat/cri-o-debuginfo<1.32.13-9.rhaos4.19.git2100f27.el9
1.32.13-9.rhaos4.19.git2100f27.el9
redhat/cri-o-debugsource<1.32.13-9.rhaos4.19.git2100f27.el9
1.32.13-9.rhaos4.19.git2100f27.el9
redhat/cri-tools-debuginfo<1.32.0-6.el9
1.32.0-6.el9
redhat/cri-tools-debugsource<1.32.0-6.el9
1.32.0-6.el9
redhat/openshift-hyperkube<4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
redhat/openshift-kube-apiserver<4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
redhat/openshift-kube-controller-manager<4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
redhat/openshift-kube-scheduler<4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
redhat/openshift-kubelet<4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
redhat/skopeo-debuginfo<1.18.1-7.rhaos4.19.el9
1.18.1-7.rhaos4.19.el9
redhat/skopeo-debugsource<1.18.1-7.rhaos4.19.el9
1.18.1-7.rhaos4.19.el9
redhat/skopeo-tests<1.18.1-7.rhaos4.19.el9
1.18.1-7.rhaos4.19.el9
redhat/cri-o<1.32.13-9.rhaos4.19.git2100f27.el9.aa
1.32.13-9.rhaos4.19.git2100f27.el9.aa
redhat/cri-o-debuginfo<1.32.13-9.rhaos4.19.git2100f27.el9.aa
1.32.13-9.rhaos4.19.git2100f27.el9.aa
redhat/cri-o-debugsource<1.32.13-9.rhaos4.19.git2100f27.el9.aa
1.32.13-9.rhaos4.19.git2100f27.el9.aa
redhat/cri-tools<1.32.0-6.el9.aa
1.32.0-6.el9.aa
redhat/cri-tools-debuginfo<1.32.0-6.el9.aa
1.32.0-6.el9.aa
redhat/cri-tools-debugsource<1.32.0-6.el9.aa
1.32.0-6.el9.aa
redhat/openshift-clients<4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el9.aa
4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el9.aa
redhat/openshift-hyperkube<4.19.0-202608111604.p2.g63adf01.assembly.stream.el9.aa
4.19.0-202608111604.p2.g63adf01.assembly.stream.el9.aa
redhat/openshift-kube-apiserver<4.19.0-202608111604.p2.g63adf01.assembly.stream.el9.aa
4.19.0-202608111604.p2.g63adf01.assembly.stream.el9.aa
redhat/openshift-kube-controller-manager<4.19.0-202608111604.p2.g63adf01.assembly.stream.el9.aa
4.19.0-202608111604.p2.g63adf01.assembly.stream.el9.aa
redhat/openshift-kube-scheduler<4.19.0-202608111604.p2.g63adf01.assembly.stream.el9.aa
4.19.0-202608111604.p2.g63adf01.assembly.stream.el9.aa
redhat/openshift-kubelet<4.19.0-202608111604.p2.g63adf01.assembly.stream.el9.aa
4.19.0-202608111604.p2.g63adf01.assembly.stream.el9.aa
redhat/ose-aws-ecr-image-credential-provider<4.19.0-202608111604.p2.g425c1c5.assembly.stream.el9.aa
4.19.0-202608111604.p2.g425c1c5.assembly.stream.el9.aa
redhat/skopeo<1.18.1-7.rhaos4.19.el9.aa
1.18.1-7.rhaos4.19.el9.aa
redhat/skopeo-debuginfo<1.18.1-7.rhaos4.19.el9.aa
1.18.1-7.rhaos4.19.el9.aa
redhat/skopeo-debugsource<1.18.1-7.rhaos4.19.el9.aa
1.18.1-7.rhaos4.19.el9.aa
redhat/skopeo-tests<1.18.1-7.rhaos4.19.el9.aa
1.18.1-7.rhaos4.19.el9.aa
redhat/openshift-clients<4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el8.aa
4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el8.aa

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/cri-o to a version that resolves this vulnerability.

    Fixed in 1.32.13-9.rhaos4.19.git2100f27.el9
  2. Upgrade

    Upgrade redhat/cri-tools to a version that resolves this vulnerability.

    Fixed in 1.32.0-6.el9
  3. Upgrade

    Upgrade redhat/openshift to a version that resolves this vulnerability.

    Fixed in 4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
  4. Upgrade

    Upgrade redhat/openshift-clients to a version that resolves this vulnerability.

    Fixed in 4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el9
  5. Upgrade

    Upgrade redhat/ose-aws-ecr-image-credential-provider to a version that resolves this vulnerability.

    Fixed in 4.19.0-202608111604.p2.g425c1c5.assembly.stream.el9
  6. Upgrade

    Upgrade redhat/skopeo to a version that resolves this vulnerability.

    Fixed in 1.18.1-7.rhaos4.19.el9
  7. Upgrade

    Upgrade redhat/cri-o-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.32.13-9.rhaos4.19.git2100f27.el9
  8. Upgrade

    Upgrade redhat/cri-o-debugsource to a version that resolves this vulnerability.

    Fixed in 1.32.13-9.rhaos4.19.git2100f27.el9
  9. Upgrade

    Upgrade redhat/cri-tools-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.32.0-6.el9
  10. Upgrade

    Upgrade redhat/cri-tools-debugsource to a version that resolves this vulnerability.

    Fixed in 1.32.0-6.el9
  11. Upgrade

    Upgrade redhat/openshift-clients-redistributable to a version that resolves this vulnerability.

    Fixed in 4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el9
  12. Upgrade

    Upgrade redhat/openshift-hyperkube to a version that resolves this vulnerability.

    Fixed in 4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
  13. Upgrade

    Upgrade redhat/openshift-kube-apiserver to a version that resolves this vulnerability.

    Fixed in 4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
  14. Upgrade

    Upgrade redhat/openshift-kube-controller-manager to a version that resolves this vulnerability.

    Fixed in 4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
  15. Upgrade

    Upgrade redhat/openshift-kube-scheduler to a version that resolves this vulnerability.

    Fixed in 4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
  16. Upgrade

    Upgrade redhat/openshift-kubelet to a version that resolves this vulnerability.

    Fixed in 4.19.0-202608111604.p2.g63adf01.assembly.stream.el9
  17. Upgrade

    Upgrade redhat/skopeo-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.18.1-7.rhaos4.19.el9
  18. Upgrade

    Upgrade redhat/skopeo-debugsource to a version that resolves this vulnerability.

    Fixed in 1.18.1-7.rhaos4.19.el9
  19. Upgrade

    Upgrade redhat/skopeo-tests to a version that resolves this vulnerability.

    Fixed in 1.18.1-7.rhaos4.19.el9
  20. Upgrade

    Upgrade redhat/openshift-clients to a version that resolves this vulnerability.

    Fixed in 4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el8
  21. Upgrade

    Upgrade redhat/openshift-clients-redistributable to a version that resolves this vulnerability.

    Fixed in 4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el8
  22. Upgrade

    Upgrade redhat/cri-o to a version that resolves this vulnerability.

    Fixed in 1.32.13-9.rhaos4.19.git2100f27.el9.aa
  23. Upgrade

    Upgrade redhat/cri-o-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.32.13-9.rhaos4.19.git2100f27.el9.aa
  24. Upgrade

    Upgrade redhat/cri-o-debugsource to a version that resolves this vulnerability.

    Fixed in 1.32.13-9.rhaos4.19.git2100f27.el9.aa
  25. Upgrade

    Upgrade redhat/cri-tools to a version that resolves this vulnerability.

    Fixed in 1.32.0-6.el9.aa
  26. Upgrade

    Upgrade redhat/cri-tools-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.32.0-6.el9.aa
  27. Upgrade

    Upgrade redhat/cri-tools-debugsource to a version that resolves this vulnerability.

    Fixed in 1.32.0-6.el9.aa
  28. Upgrade

    Upgrade redhat/openshift-clients to a version that resolves this vulnerability.

    Fixed in 4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el9.aa
  29. Upgrade

    Upgrade redhat/openshift-hyperkube to a version that resolves this vulnerability.

    Fixed in 4.19.0-202608111604.p2.g63adf01.assembly.stream.el9.aa
  30. Upgrade

    Upgrade redhat/openshift-kube-apiserver to a version that resolves this vulnerability.

    Fixed in 4.19.0-202608111604.p2.g63adf01.assembly.stream.el9.aa
  31. Upgrade

    Upgrade redhat/openshift-kube-controller-manager to a version that resolves this vulnerability.

    Fixed in 4.19.0-202608111604.p2.g63adf01.assembly.stream.el9.aa
  32. Upgrade

    Upgrade redhat/openshift-kube-scheduler to a version that resolves this vulnerability.

    Fixed in 4.19.0-202608111604.p2.g63adf01.assembly.stream.el9.aa
  33. Upgrade

    Upgrade redhat/openshift-kubelet to a version that resolves this vulnerability.

    Fixed in 4.19.0-202608111604.p2.g63adf01.assembly.stream.el9.aa
  34. Upgrade

    Upgrade redhat/ose-aws-ecr-image-credential-provider to a version that resolves this vulnerability.

    Fixed in 4.19.0-202608111604.p2.g425c1c5.assembly.stream.el9.aa
  35. Upgrade

    Upgrade redhat/skopeo to a version that resolves this vulnerability.

    Fixed in 1.18.1-7.rhaos4.19.el9.aa
  36. Upgrade

    Upgrade redhat/skopeo-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.18.1-7.rhaos4.19.el9.aa
  37. Upgrade

    Upgrade redhat/skopeo-debugsource to a version that resolves this vulnerability.

    Fixed in 1.18.1-7.rhaos4.19.el9.aa
  38. Upgrade

    Upgrade redhat/skopeo-tests to a version that resolves this vulnerability.

    Fixed in 1.18.1-7.rhaos4.19.el9.aa
  39. Upgrade

    Upgrade redhat/openshift-clients to a version that resolves this vulnerability.

    Fixed in 4.19.0-202608111604.p2.gb2a93a6.assembly.stream.el8.aa
  40. Upgrade

    Upgrade OpenShift Container Platform to a version that resolves this vulnerability.

    Fixed in 4.19.43Patch RHSA-2026:54555

Event History

Aug 19, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software

Frequently Asked Questions

1

Which environments should be updated?

All Red Hat OpenShift Container Platform 4.19 users are advised to upgrade to the updated packages and images when they become available in the appropriate release channel.

2

What kinds of inputs can trigger the addressed denial-of-service issues?

The fixes address a long CNAME response processed by Go's LookupCNAME and crafted or pathological email inputs processed by the Go net/mail package.

3

How can administrators check whether the update is available?

Administrators can check for available updates using the OpenShift CLI (oc) or the web console. The advisory also distinguishes RPM packages from the container images provided through a separate advisory.

Company

Resources

Contact

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