What is RHSA-2026:68538?

RHSA-2026:68538 is a security advisory published by Red Hat Product Security with High severity. Red Hat Security Advisory: OpenShift Container Platform 4.21.34 packages and security update

Which CVE IDs does RHSA-2026:68538 cover?

RHSA-2026:68538 covers the following CVE IDs: CVE-2026-56862. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of RHSA-2026:68538?

RHSA-2026:68538 has a CVSS v3 base score of 7.5, published by Red Hat Product Security.

Which products are affected by RHSA-2026:68538?

RHSA-2026:68538 affects 27 products, including: Red Hat OpenShift Container Platform 4.21; cri-o-0:1.34.13-6.rhaos4.21.git6253162.el9.aarch64 as a component of Red Hat OpenShift Container Platform 4.21; cri-o-0:1.34.13-6.rhaos4.21.git6253162.el9.ppc64le as a component of Red Hat OpenShift Container Platform 4.21; cri-o-0:1.34.13-6.rhaos4.21.git6253162.el9.s390x as a component of Red Hat OpenShift Container Platform 4.21; cri-o-0:1.34.13-6.rhaos4.21.git6253162.el9.src as a component of Red Hat OpenShift Container Platform 4.21; and others — see the full list on the advisory page.

RHSA-2026:68538HighCVSS 7.5

Red Hat Security Advisory: OpenShift Container Platform 4.21.34 packages and security update

Vendor

Red Hat Product Security

Published

September 22, 2026

Last Modified

September 22, 2026

🔗 CVE IDs covered (1)

CVE-2026-56862 →

📋 Description

CVE-2026-56862 — crypto/tls: golang: Golang crypto/tls: Denial of Service via indefinite KeyUpdate messages

🎯 Affected products27

Red Hat OpenShift Container Platform 4.21
cri-o-0:1.34.13-6.rhaos4.21.git6253162.el9.aarch64 as a component of Red Hat OpenShift Container Platform 4.21
cri-o-0:1.34.13-6.rhaos4.21.git6253162.el9.ppc64le as a component of Red Hat OpenShift Container Platform 4.21
cri-o-0:1.34.13-6.rhaos4.21.git6253162.el9.s390x as a component of Red Hat OpenShift Container Platform 4.21
cri-o-0:1.34.13-6.rhaos4.21.git6253162.el9.src as a component of Red Hat OpenShift Container Platform 4.21
cri-o-0:1.34.13-6.rhaos4.21.git6253162.el9.x86_64 as a component of Red Hat OpenShift Container Platform 4.21
cri-o-debuginfo-0:1.34.13-6.rhaos4.21.git6253162.el9.aarch64 as a component of Red Hat OpenShift Container Platform 4.21
cri-o-debuginfo-0:1.34.13-6.rhaos4.21.git6253162.el9.ppc64le as a component of Red Hat OpenShift Container Platform 4.21
cri-o-debuginfo-0:1.34.13-6.rhaos4.21.git6253162.el9.s390x as a component of Red Hat OpenShift Container Platform 4.21
cri-o-debuginfo-0:1.34.13-6.rhaos4.21.git6253162.el9.x86_64 as a component of Red Hat OpenShift Container Platform 4.21
cri-o-debugsource-0:1.34.13-6.rhaos4.21.git6253162.el9.aarch64 as a component of Red Hat OpenShift Container Platform 4.21
cri-o-debugsource-0:1.34.13-6.rhaos4.21.git6253162.el9.ppc64le as a component of Red Hat OpenShift Container Platform 4.21
cri-o-debugsource-0:1.34.13-6.rhaos4.21.git6253162.el9.s390x as a component of Red Hat OpenShift Container Platform 4.21
cri-o-debugsource-0:1.34.13-6.rhaos4.21.git6253162.el9.x86_64 as a component of Red Hat OpenShift Container Platform 4.21
ose-gcp-gcr-image-credential-provider-0:4.21.0-202609141848.p2.g0b668ce.assembly.stream.el10.aarch64 as a component of Red Hat OpenShift Container Platform 4.21
ose-gcp-gcr-image-credential-provider-0:4.21.0-202609141848.p2.g0b668ce.assembly.stream.el10.ppc64le as a component of Red Hat OpenShift Container Platform 4.21
ose-gcp-gcr-image-credential-provider-0:4.21.0-202609141848.p2.g0b668ce.assembly.stream.el10.s390x as a component of Red Hat OpenShift Container Platform 4.21
ose-gcp-gcr-image-credential-provider-0:4.21.0-202609141848.p2.g0b668ce.assembly.stream.el10.src as a component of Red Hat OpenShift Container Platform 4.21
ose-gcp-gcr-image-credential-provider-0:4.21.0-202609141848.p2.g0b668ce.assembly.stream.el10.x86_64 as a component of Red Hat OpenShift Container Platform 4.21
ose-gcp-gcr-image-credential-provider-0:4.21.0-202609141848.p2.g0b668ce.assembly.stream.el8.ppc64le as a component of Red Hat OpenShift Container Platform 4.21
ose-gcp-gcr-image-credential-provider-0:4.21.0-202609141848.p2.g0b668ce.assembly.stream.el8.s390x as a component of Red Hat OpenShift Container Platform 4.21
ose-gcp-gcr-image-credential-provider-0:4.21.0-202609141848.p2.g0b668ce.assembly.stream.el8.src as a component of Red Hat OpenShift Container Platform 4.21
ose-gcp-gcr-image-credential-provider-0:4.21.0-202609141848.p2.g0b668ce.assembly.stream.el8.x86_64 as a component of Red Hat OpenShift Container Platform 4.21
ose-gcp-gcr-image-credential-provider-0:4.21.0-202609141848.p2.g0b668ce.assembly.stream.el9.ppc64le as a component of Red Hat OpenShift Container Platform 4.21
ose-gcp-gcr-image-credential-provider-0:4.21.0-202609141848.p2.g0b668ce.assembly.stream.el9.s390x as a component of Red Hat OpenShift Container Platform 4.21
ose-gcp-gcr-image-credential-provider-0:4.21.0-202609141848.p2.g0b668ce.assembly.stream.el9.src as a component of Red Hat OpenShift Container Platform 4.21
ose-gcp-gcr-image-credential-provider-0:4.21.0-202609141848.p2.g0b668ce.assembly.stream.el9.x86_64 as a component of Red Hat OpenShift Container Platform 4.21

✅ Remediation

For OpenShift Container Platform 4.21 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/4.21/html/release_notes/

🔗 CVE IDs covered (1)

📋 Description

🎯 Affected products27

✅ Remediation

🔗 References (4)