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 covers security updates in Red Hat OpenShift Container Platform 4.19.34, which fixes two critical vulnerabilities. CVE-2026-41326 affects kata-containers and allows arbitrary file writes inside the guest image through the CopyFile policy. CVE-2026-43037 is a kernel vulnerability in the ip6_tunnel component involving clearing skb2->cb[] in ip4ip6_err(). Red Hat has released updated container images and RPM packages to address these issues. The advisory recommends upgrading to version 4.19.34 using the OpenShift CLI or web console. No CVSS scores are provided in the advisory, but the severity is rated critical by Red Hat Product Security.
Potential Impact
Successful exploitation of CVE-2026-41326 could allow an attacker to perform arbitrary file writes inside the guest image of kata-containers, potentially leading to unauthorized code execution or system compromise. CVE-2026-43037 involves a kernel-level issue that may affect system stability or security related to IPv6 tunneling. Both vulnerabilities are rated critical, indicating a high risk to affected systems if unpatched.
Mitigation Recommendations
Red Hat has released OpenShift Container Platform 4.19.34 containing fixes for these vulnerabilities. Users should upgrade to this version as soon as it is available in their release channel. Upgrades can be performed using the OpenShift CLI (oc) or the web console. Detailed upgrade instructions are available in the official Red Hat documentation. No alternative mitigations or workarounds are indicated in the advisory.
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 covers security updates in Red Hat OpenShift Container Platform 4.19.34, which fixes two critical vulnerabilities. CVE-2026-41326 affects kata-containers and allows arbitrary file writes inside the guest image through the CopyFile policy. CVE-2026-43037 is a kernel vulnerability in the ip6_tunnel component involving clearing skb2->cb[] in ip4ip6_err(). Red Hat has released updated container images and RPM packages to address these issues. The advisory recommends upgrading to version 4.19.34 using the OpenShift CLI or web console. No CVSS scores are provided in the advisory, but the severity is rated critical by Red Hat Product Security.
Potential Impact
Successful exploitation of CVE-2026-41326 could allow an attacker to perform arbitrary file writes inside the guest image of kata-containers, potentially leading to unauthorized code execution or system compromise. CVE-2026-43037 involves a kernel-level issue that may affect system stability or security related to IPv6 tunneling. Both vulnerabilities are rated critical, indicating a high risk to affected systems if unpatched.
Mitigation Recommendations
Red Hat has released OpenShift Container Platform 4.19.34 containing fixes for these vulnerabilities. Users should upgrade to this version as soon as it is available in their release channel. Upgrades can be performed using the OpenShift CLI (oc) or the web console. Detailed upgrade instructions are available in the official Red Hat documentation. No alternative mitigations or workarounds are indicated in the advisory.
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"]
- Cvss Version
- null
Threat ID: 6a343cacf198dc38c14e2300
Added to database: 06/18/2026, 18:45:00 UTC
Last enriched: 07/07/2026, 00:16:10 UTC
Last updated: 08/02/2026, 19:17:58 UTC
Views: 121
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