The following advisory data is extracted from:

https://security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_3052.json

Red Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.

- Packet Storm Staff




====================================================================
Red Hat Security Advisory

Synopsis:           Important: Gatekeeper v3.18.0
Advisory ID:        RHSA-2025:3052-03
Product:            gatekeeper
Advisory URL:       https://access.redhat.com/errata/RHSA-2025:3052
Issue date:         2025-03-20
Revision:           03
CVE Names:          CVE-2025-22869
====================================================================

Summary: 

Gatekeeper v3.18.0




Description:

Gatekeeper v3.18.0

Gatekeeper is a validating webhook with auditing capabilities that can
enforce custom resource definition-based policies that are run with the
Open Policy Agent (OPA). Gatekeeper is supported through a Red Hat Advanced
Cluster Management for Kubernetes subscription.

Starting in v3.17, users can specify a `containerArguments` list of names
and values for both the audit and webhook configurations to be passed to
the respective deployment. These will be ignored if the argument has
already been set by the operator or specifies an argument listed in the
deny list.

Starting in v3.15, the following namespaces are exempt from admission
control:

* kube-*
* multicluster-engine
* hypershift
* hive
* rhacs-operator
* open-cluster-*
* openshift-*

To disable the default exempt namespaces, set the namespaces you want on
the object.

Security fix(es):

* golang.org/x/crypto/ssh: Denial of Service in the Key Exchange of
golang.org/x/crypto/ssh (CVE-2025-22869)

Additional Release Notes:

* v3.18.0 https://github.com/open-policy-agent/gatekeeper/releases/tag/v3.18.0
* v3.18.1 https://github.com/open-policy-agent/gatekeeper/releases/tag/v3.18.1
* v3.18.2 https://github.com/open-policy-agent/gatekeeper/releases/tag/v3.18.2


Solution:

https://access.redhat.com/products/red-hat-advanced-cluster-management-for-kubernetes.



CVEs:

CVE-2025-22869

References:

https://access.redhat.com/security/updates/classification/#important
https://github.com/open-policy-agent/gatekeeper/releases/tag/v3.18.0
https://github.com/open-policy-agent/gatekeeper/releases/tag/v3.18.1
https://github.com/open-policy-agent/gatekeeper/releases/tag/v3.18.2
https://bugzilla.redhat.com/show_bug.cgi?id=2348367
https://issues.redhat.com/browse/ACM-15684
https://issues.redhat.com/browse/ACM-15900
https://issues.redhat.com/browse/HYPBLD-604