RHSA-2026:25181: Critical: OpenShift Container Platform 4.18.44 bug fix and security update
Critical: OpenShift Container Platform 4.18.44 bug fix and security update
Other sources
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 4.18.44. See the following advisory for the RPM packages for this release:https://access.redhat.com/errata/RHSA-2026:25180 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/openshiftcontainerplatform/4.18/html/releasenotes/ Security Fix(es): kernel: ip6tunnel: clear skb2->cb[] in ip4ip6err() (CVE-2026-43037) libcap: libcap: Privilege escalation via TOCTOU race condition in capsetfile() (CVE-2026-4878) OpenSSH: OpenSSH: Privilege escalation via scp legacy protocol when not preserving file mode (CVE-2026-35385) jq: out-of-bounds read in jvparsesized() on error formatting for non-NUL-terminated buffers (CVE-2026-39979) jq: jq: Denial of Service via crafted JSON object causing hash collisions (CVE-2026-40164) rsync: Rsync: Use-after-free vulnerability in extended attribute handling (CVE-2026-41035) 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/openshiftcontainerplatform/4.18/html-single/updatingclusters/index#updating-cluster-cli.
— Red Hat
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Red Hat OpenShift Container Platformto a version that resolves this vulnerability.Fixed in 4.18.44 - Upgrade
Upgrade
Red Hat OpenShift Container Platform RPM packagesto a version that resolves this vulnerability.Patch RHSA-2026:25180 - Operational
Use the OpenShift CLI (oc) or the web console to check for available updates in the appropriate release channel and apply the OpenShift Container Platform 4.18.44 release following the documented cluster upgrade procedure for OpenShift Container Platform 4.18.
- Operational
Inspect and verify the release image digests for your architecture before and after upgrade. The release image sha values provided for this release are: x86_64: sha256:2a7a95814b1b307813552472d18ef7aee7930748f707d730c4e816bdced1dac9; s390x: sha256:363adcf59338bad26a33111d98322c8501d16707b295bd4328b30a04d6f1ce51; ppc64le: sha256:6bf4deb41dcade0c2eedc88af3495eb05847bfb1f74351c3a896cb697d13ada1; aarch64: sha256:f0ce3bc7f47d2bda4696f49eba84569ac87f1b2b42852e9f8756fe0a3f9a853f.
Event History
Frequently Asked Questions
What is the severity of RHSA-2026:25181?
The severity of RHSA-2026:25181 is critical with a CVSS score of 9.
How do I fix RHSA-2026:25181?
To fix RHSA-2026:25181, update your Red Hat OpenShift Container Platform to version 4.18.44 or later.
What vulnerabilities are addressed in RHSA-2026:25181?
RHSA-2026:25181 addresses vulnerabilities related to Use After Free and Race Condition.
Which software versions are affected by RHSA-2026:25181?
RHSA-2026:25181 affects various versions of Red Hat OpenShift Container Platform, including for ARM 64, Power, and IBM Z.
When was RHSA-2026:25181 published?
RHSA-2026:25181 was published on June 17, 2026.