RHSA-2026:44231 - Security Advisory

Topic

Red Hat OpenShift Container Platform release 4.19.40 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 4.19.

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

https://access.redhat.com/errata/RHBA-2026:44228

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/4.19/html/release_notes/

Security Fix(es):

• kernel: netfilter: flowtable: strictly check for maximum number of

actions (CVE-2026-43329)

• kernel: eventpoll: fix ep_remove struct eventpoll / struct file UAF

(CVE-2026-46242)

• kernel: KVM: arm64: vgic-its: Drop the translation cache reference only

for the erased entry (CVE-2026-46316)

• kernel: Linux kernel: Use-After-Free in net/gro due to improper handling

of zerocopy skbs (CVE-2026-46323)

• kernel: KVM: x86: Fix shadow paging use-after-free due to unexpected role

(CVE-2026-53359)

• openssl: openssl: Information Disclosure from Uninitialized Memory via

Invalid RSA Public Key (CVE-2026-31790)

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 4.19 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/4.19/html-single/updating_clusters/index#updating-cluster-cli.

Solution

For OpenShift Container Platform 4.19 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/4.19/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 sha256:800712da0a4fa8353d0f94a06efa9e6a1479726b653b0d8ad1243f014d40f1bf

(For s390x architecture)
The image digest is sha256:4d0acc69187a33b0b10a3eeebbe7d60a7538e3c7a70e37054370f7b24b649349

(For ppc64le architecture)
The image digest is sha256:310602fabcd047776ecc3c52f82b03a56f4fbe79c1b052a5a6163a271f350227

(For aarch64 architecture)
The image digest is sha256:feeb5daa474f243df61a0e7043c8242bfdfbaa445ca5a22565bc8dcbe42aae93

All OpenShift Container Platform 4.19 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/4.19/html-single/updating_clusters/index#updating-cluster-cli.

Affected Products

• Red Hat OpenShift Container Platform 4.19 for RHEL 9 x86_64
• Red Hat OpenShift Container Platform 4.19 for RHEL 8 x86_64
• Red Hat OpenShift Container Platform for Power 4.19 for RHEL 9 ppc64le
• Red Hat OpenShift Container Platform for Power 4.19 for RHEL 8 ppc64le
• Red Hat OpenShift Container Platform for IBM Z and LinuxONE 4.19 for RHEL 9 s390x
• Red Hat OpenShift Container Platform for IBM Z and LinuxONE 4.19 for RHEL 8 s390x
• Red Hat OpenShift Container Platform for ARM 64 4.19 for RHEL 9 aarch64
• Red Hat OpenShift Container Platform for ARM 64 4.19 for RHEL 8 aarch64

Fixes

• BZ - 2451094 - CVE-2026-31790 openssl: openssl: Information Disclosure from Uninitialized Memory via Invalid RSA Public Key
• BZ - 2468124 - CVE-2026-43329 kernel: netfilter: flowtable: strictly check for maximum number of actions
• BZ - 2479832 - CVE-2026-46323 kernel: Linux kernel: Use-After-Free in net/gro due to improper handling of zerocopy skbs
• BZ - 2483519 - CVE-2026-46242 kernel: eventpoll: fix ep_remove struct eventpoll / struct file UAF
• BZ - 2486982 - CVE-2026-46316 kernel: KVM: arm64: vgic-its: Drop the translation cache reference only for the erased entry
• BZ - 2497033 - CVE-2026-53359 kernel: KVM: x86: Fix shadow paging use-after-free due to unexpected role

CVEs

• CVE-2026-31790
• CVE-2026-43329
• CVE-2026-46242
• CVE-2026-46316
• CVE-2026-46323
• CVE-2026-53359

References

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