Red Hat Security AdvisoryRHSA-2026:89626
OpenShift Container Platform 4.21.40 bug fix and security update
Released 2026-10-26 · Red Hat rating Important · View on Red Hat →
Fixed in
- Red Hat OpenShift Container Platform 4.21 registry.redhat.io/openshift4/aws-karpenter-provider-aws-rhel9, registry.redhat.io/openshift4/aws-kms-encryption-provider-rhel9, registry.redhat.io/openshift4/azure-kms-encryption-provider-rhel9 +47
Fixes 5 records
Priority MEDIUM 47
The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label.
CVSS 3.1CRITICAL 9.6· Network · Low privileges · No interaction · EPSS 0.01834 · Published 2026-05-22 · Partial fix · 1.25.13, 1.26.6 +2 CWE-1289
Priority MEDIUM 40
When processing HTTP/2 SETTINGS frames, transport will enter an infinite loop of writing CONTINUATION frames if it receives a SETTINGS_MAX_FRAME_SIZE with a value of 0.
CVSS 3.1HIGH 7.5· Network · No auth · No interaction · EPSS 0.0084 · Published 2026-05-07 · Partial fix · 0.53.0, 1.25.10 +1 CWE-835
Priority LOW 39
The RSA and DSA public key parsers did not enforce size limits on key parameters.
CVSS 3.1HIGH 7.5· Network · No auth · No interaction · EPSS 0.00467 · Published 2026-05-22 · Partial fix · 0.52.0 CWE-347
Priority LOW 32
On most platforms, Go uses the given system root certificates.
CVSS 3.1MEDIUM 6.8· Network · No auth · User interaction · EPSS 0.00396 · Published 2026-10-21 · Partial fix · 1.26.10, 1.27.3 CWE-299
Priority LOW 30
A flaw was found in the cluster-samples-operator.
CVSS 3.1MEDIUM 6.8· Adjacent network · Low privileges · No interaction · EPSS 0.00275 · Published 2026-10-07 · Partial fix · 1793123280, 1792826398 +2 CWE-250
THREATIST.IORead the docs