Red Hat Security Advisory: OpenShift Container Platform 4.19.34 bug fix and security update
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 4.19.34. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/RHBA-2026:25199 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: ip6_tunnel: clear skb2->cb[] in ip4ip6_err() (CVE-2026-43037) * kata-containers: Arbitrary file write inside guest image via CopyFile policy (CVE-2026-41326) 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.
AI Analysis
Technical Summary
This advisory for Red Hat OpenShift Container Platform 4.19.34 addresses two critical security vulnerabilities. CVE-2026-41326 involves an arbitrary file write vulnerability inside the guest image of kata-containers through the CopyFile policy, potentially allowing unauthorized modification of files. CVE-2026-43037 is a kernel vulnerability related to the ip6_tunnel component where skb2->cb[] is not cleared in ip4ip6_err(), which could lead to security issues. The update includes fixed container images and RPM packages to resolve these vulnerabilities. The advisory recommends upgrading to the 4.19.34 release to apply these fixes.
Potential Impact
The vulnerabilities have been rated critical by Red Hat Product Security. CVE-2026-41326 could allow an attacker to perform arbitrary file writes inside the guest image of kata-containers, potentially compromising container integrity or security. CVE-2026-43037 affects the kernel's ip6_tunnel functionality and may lead to security issues related to improper handling of packet buffers. These vulnerabilities impact Red Hat OpenShift Container Platform 4.19 deployments on multiple architectures including x86_64, s390x, ppc64le, and aarch64. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
A fix is available in Red Hat OpenShift Container Platform 4.19.34, which includes updated container images and RPM packages addressing these vulnerabilities. Users should upgrade their OpenShift clusters to version 4.19.34 using the OpenShift CLI (oc) or web console as soon as the update is available in their release channel. Detailed upgrade instructions are provided by Red Hat at https://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html-single/updating_clusters/index#updating-cluster-cli. No additional mitigations are specified beyond applying this update.
Red Hat Security Advisory: OpenShift Container Platform 4.19.34 bug fix and security update
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 4.19.34. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/RHBA-2026:25199 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: ip6_tunnel: clear skb2->cb[] in ip4ip6_err() (CVE-2026-43037) * kata-containers: Arbitrary file write inside guest image via CopyFile policy (CVE-2026-41326) 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.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory for Red Hat OpenShift Container Platform 4.19.34 addresses two critical security vulnerabilities. CVE-2026-41326 involves an arbitrary file write vulnerability inside the guest image of kata-containers through the CopyFile policy, potentially allowing unauthorized modification of files. CVE-2026-43037 is a kernel vulnerability related to the ip6_tunnel component where skb2->cb[] is not cleared in ip4ip6_err(), which could lead to security issues. The update includes fixed container images and RPM packages to resolve these vulnerabilities. The advisory recommends upgrading to the 4.19.34 release to apply these fixes.
Potential Impact
The vulnerabilities have been rated critical by Red Hat Product Security. CVE-2026-41326 could allow an attacker to perform arbitrary file writes inside the guest image of kata-containers, potentially compromising container integrity or security. CVE-2026-43037 affects the kernel's ip6_tunnel functionality and may lead to security issues related to improper handling of packet buffers. These vulnerabilities impact Red Hat OpenShift Container Platform 4.19 deployments on multiple architectures including x86_64, s390x, ppc64le, and aarch64. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
A fix is available in Red Hat OpenShift Container Platform 4.19.34, which includes updated container images and RPM packages addressing these vulnerabilities. Users should upgrade their OpenShift clusters to version 4.19.34 using the OpenShift CLI (oc) or web console as soon as the update is available in their release channel. Detailed upgrade instructions are provided by Red Hat at https://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html-single/updating_clusters/index#updating-cluster-cli. No additional mitigations are specified beyond applying this update.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:25200
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-43037"]
Threat ID: 6a343cacf198dc38c14e2300
Added to database: 06/18/2026, 18:45:00 UTC
Last enriched: 08/11/2026, 20:34:49 UTC
Last updated: 09/16/2026, 02:44:11 UTC
Views: 400
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