RHSA-2025:3775 - Security Advisory

Topic

Red Hat OpenShift Container Platform release 4.18.9 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 4.18.

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

https://access.redhat.com/errata/RHBA-2025:3777

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/4.18/html/release_notes/

Security Fix(es):

• bind: bind9: Many records in the additional section cause CPU exhaustion

(CVE-2024-11187)

• libxml2: Stack-based buffer overflow in xmlSnprintfElements of libxml2

(CVE-2025-24928)

• jinja2: Jinja sandbox breakout through attr filter selecting format

method (CVE-2025-27516)

• golang-jwt/jwt: jwt-go allows excessive memory allocation during header

parsing (CVE-2025-30204)

• libxml: use-after-free in xmlXIncludeAddNode (CVE-2022-49043)
• go-jose: Go JOSE's Parsing Vulnerable to Denial of Service

(CVE-2025-27144)

• baremetal-operator/apis: Bare Metal Operator (BMO) can expose any secret

from other namespaces via BMCEventSubscription CRD (CVE-2025-29781)

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 4.18 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/4.18/html-single/updating_clusters/index#updating-cluster-cli.

Solution

For OpenShift Container Platform 4.18 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/4.18/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 sha256:720f89718effd16de7d77e5533c9608f1845295a2e00dfff543d0cf9aa09b2a0

(For s390x architecture)
The image digest is sha256:d82ec502516460379739026329cb4a5231f8d27edbba8f23dff4d8ccff9b18f3

(For ppc64le architecture)
The image digest is sha256:9006d776ad56184e1c486e470c9c486c0f5ade36835f4e20708c40b1a64c5929

(For aarch64 architecture)
The image digest is sha256:c5991a00282e25fb0fb1fdf44ccc3c7a2a88d24015212cc8770b418422dc71c0

All OpenShift Container Platform 4.18 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/4.18/html-single/updating_clusters/index#updating-cluster-cli.

Affected Products

• Red Hat OpenShift Container Platform 4.18 for RHEL 9 x86_64
• Red Hat OpenShift Container Platform 4.18 for RHEL 8 x86_64
• Red Hat OpenShift Container Platform for Power 4.18 for RHEL 9 ppc64le
• Red Hat OpenShift Container Platform for Power 4.18 for RHEL 8 ppc64le
• Red Hat OpenShift Container Platform for IBM Z and LinuxONE 4.18 for RHEL 9 s390x
• Red Hat OpenShift Container Platform for IBM Z and LinuxONE 4.18 for RHEL 8 s390x
• Red Hat OpenShift Container Platform for ARM 64 4.18 for RHEL 9 aarch64
• Red Hat OpenShift Container Platform for ARM 64 4.18 for RHEL 8 aarch64

Fixes

• BZ - 2342118 - CVE-2022-49043 libxml: use-after-free in xmlXIncludeAddNode
• BZ - 2342879 - CVE-2024-11187 bind: bind9: Many records in the additional section cause CPU exhaustion
• BZ - 2346421 - CVE-2025-24928 libxml2: Stack-based buffer overflow in xmlSnprintfElements of libxml2
• BZ - 2347423 - CVE-2025-27144 go-jose: Go JOSE's Parsing Vulnerable to Denial of Service
• BZ - 2350190 - CVE-2025-27516 jinja2: Jinja sandbox breakout through attr filter selecting format method
• BZ - 2353041 - CVE-2025-29781 baremetal-operator/apis: Bare Metal Operator (BMO) can expose any secret from other namespaces via BMCEventSubscription CRD
• BZ - 2354195 - CVE-2025-30204 golang-jwt/jwt: jwt-go allows excessive memory allocation during header parsing
• OCPBUGS-43724 - OpenShift 4.17 IPI Private cluster installation failure due to static IP not in range of Subnet
• OCPBUGS-47470 - [backport 418] Multus thin plugin's CmdDel waits for API server indefinitely
• OCPBUGS-48790 - [4.18]Insights-runtime-extractor pod return 500 after patching trustedCA using proxy
• OCPBUGS-50965 - [BGP UDN EIP pre-merge testing] UDN pod that is not qualified to use egressIP should use its own UDN pod IP instead of its node IP as source IP in egressing packets
• OCPBUGS-52837 - [4.18] The validatingwebhookconfigurations is being deleted when deploying metallb
• OCPBUGS-52956 - [4.18]T-GM announces "Locked" too fast after holdover
• OCPBUGS-53015 - Bump to Kubernetes 1.31.7
• OCPBUGS-53241 - Autoscaler does not work after entering in failed status for a single machineautoscaler
• OCPBUGS-54342 - [4.18] SELinux container_logreader_t cannot watch /var/log symlinks
• OCPBUGS-54383 - Azure-Disk node don't have the permission to remove node taint
• OCPBUGS-54411 - Problem with validatingWebhook on Hosted Control Plane
• OCPBUGS-54581 - Topology view crashes
• OCPBUGS-54609 - ibmcloud should not require ignition endpoint exposure in the API
• OCPBUGS-54625 - HCP applies featureset-guarded manifests when bootstrapping CVO
• OCPBUGS-54627 - Hypershift OAuth failing to connect to IdentityProvider when using a proxy with additionalTrustBundle and IdentityProvider URL can be publicly verified
• OCPBUGS-54680 - Add delay in linuxptp-daemon to wait for socket to be ready
• OCPBUGS-54701 - Add manifest-topology.yaml for topology related feature and test in vSphere
• OCPBUGS-54671 - [4.18] ovnkube-controller stuck in crashloopbackoff when upgrading to 4.18 with clusterNetwork set to multiple networks of the same IP family

CVEs

• CVE-2022-49043
• CVE-2024-2236
• CVE-2024-5535
• CVE-2024-11187
• CVE-2024-55549
• CVE-2025-24928
• CVE-2025-27144
• CVE-2025-27516
• CVE-2025-29781
• CVE-2025-30204

References

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