RHSA-2026:57362 - Security Advisory

Topic

Red Hat OpenShift Container Platform release 4.22.11 is now available with
updates to packages and images that fix several bugs and add enhancements.

This release includes a security update for Red Hat OpenShift Container
Platform 4.22.

Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

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 4.22.11. See the following advisory for the RPM packages for this
release:

https://access.redhat.com/errata/RHSA-2026:57361

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/4.22/html/release_notes/

Security Fix(es):

• bind: bind9: Potential memory usage beyond configured limits

(CVE-2026-11622)

• bind: bind9: Cache poisoning via label count discrepancy, RRSIG,

wildcards (CVE-2026-11721)

• bind: bind9: Unexpected exit with NSEC and NSEC3 both present

(CVE-2026-13204)

• bind: bind9: DNSSEC Validation Bypass via Out-of-Zone NSEC Next Field

(CVE-2026-13321)

• kernel: net: openvswitch: reject oversized nested action attrs

(CVE-2026-64531)

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 4.22 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/4.22/html-single/updating_clusters/index#updating-cluster-cli.

Solution

For OpenShift Container Platform 4.22 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/4.22/html/release_notes/

You may download the oc tool and use it to inspect release image metadata
for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests
may be found at
https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.

The sha values for the release are as follows:

(For x86_64 architecture)
The image digest is
sha256:7130a86441e55382a1eecf141edefd4a83c6eb7b27c6cb67883027736b8242b3

(For s390x architecture)
The image digest is
sha256:d2fc4065149f9310168334a67e530e58d6a80f302877493e9fee91547accb27f

(For ppc64le architecture)
The image digest is
sha256:a0eb0d2d1b0ae972b00535e3f8b25a825efccca03ac01f1682fbd7f7b790d63d

(For aarch64 architecture)
The image digest is
sha256:9bf8fa70aacd7119c25e466d563b24b867de1c16648a975978cfb42de7aacc6a

All OpenShift Container Platform 4.22 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/4.22/html-single/updating_clusters/index#updating-cluster-cli.

Affected Products

• Red Hat OpenShift Container Platform 4.22 for RHEL 9 x86_64
• Red Hat OpenShift Container Platform 4.22 for RHEL 8 x86_64
• Red Hat OpenShift Container Platform for Power 4.22 for RHEL 9 ppc64le
• Red Hat OpenShift Container Platform for Power 4.22 for RHEL 8 ppc64le
• Red Hat OpenShift Container Platform for IBM Z and LinuxONE 4.22 for RHEL 9 s390x
• Red Hat OpenShift Container Platform for IBM Z and LinuxONE 4.22 for RHEL 8 s390x
• Red Hat OpenShift Container Platform for ARM 64 4.22 for RHEL 9 aarch64
• Red Hat OpenShift Container Platform for ARM 64 4.22 for RHEL 8 aarch64

Fixes

• BZ - 2504166 - CVE-2026-13321 bind: bind9: DNSSEC Validation Bypass via Out-of-Zone NSEC Next Field
• BZ - 2504298 - CVE-2026-11622 bind: bind9: Potential memory usage beyond configured limits
• BZ - 2504338 - CVE-2026-11721 bind: bind9: Cache poisoning via label count discrepancy, RRSIG, wildcards
• BZ - 2504447 - CVE-2026-13204 bind: bind9: Unexpected exit with NSEC and NSEC3 both present
• BZ - 2507402 - CVE-2026-64531 kernel: net: openvswitch: reject oversized nested action attrs

CVEs

• CVE-2026-11622
• CVE-2026-11721
• CVE-2026-13204
• CVE-2026-13321
• CVE-2026-64531

References

• https://access.redhat.com/security/updates/classification/#important