Red Hat Security Advisory: OpenShift Container Platform 4.18.27 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 4.18.27. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/155476 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): * libarchive: Double free at archive_read_format_rar_seek_data() in archive_read_support_format_rar.c (CVE-2025-5914) * unbound: Unbound Cache poisoning (CVE-2025-5994) * sqlite: Integer Truncation in SQLite (CVE-2025-6965) * podman: Podman kube play command may overwrite host files (CVE-2025-9566) * libxml: Heap use after free (UAF) leads to Denial of service (DoS) (CVE-2025-49794) * libxml: Type confusion leads to Denial of service (DoS) (CVE-2025-49796) 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.
AI Analysis
Technical Summary
This advisory covers security updates in Red Hat OpenShift Container Platform 4.18.27, which fixes six vulnerabilities: CVE-2025-5914 (libarchive double free), CVE-2025-5994 (unbound cache poisoning), CVE-2025-6965 (SQLite integer truncation), CVE-2025-9566 (Podman kube play command may overwrite host files), CVE-2025-49794 (libxml heap use after free leading to denial of service), and CVE-2025-49796 (libxml type confusion leading to denial of service). These vulnerabilities impact container images and RPM packages used in OpenShift 4.18 deployments. The advisory recommends upgrading to 4.18.27, which contains fixes for these issues. No CVSS scores are provided in the advisory, but the overall security impact is rated as Important by Red Hat Product Security.
Potential Impact
The vulnerabilities fixed in this update include memory corruption (double free, use after free), cache poisoning, integer truncation, and potential host file overwrite, which could lead to denial of service or unauthorized modification of host files. These issues could affect the stability, security, and integrity of OpenShift Container Platform deployments if left unpatched. The combined impact is considered high severity by the advisory.
Mitigation Recommendations
Red Hat OpenShift Container Platform 4.18 users should upgrade to version 4.18.27, which contains the necessary security fixes. Updates are available through the appropriate release channels and can be applied using the OpenShift CLI (oc) or web console. Detailed upgrade instructions are provided in the official Red Hat documentation. No additional mitigations are indicated beyond applying the update.
Red Hat Security Advisory: OpenShift Container Platform 4.18.27 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 4.18.27. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/155476 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): * libarchive: Double free at archive_read_format_rar_seek_data() in archive_read_support_format_rar.c (CVE-2025-5914) * unbound: Unbound Cache poisoning (CVE-2025-5994) * sqlite: Integer Truncation in SQLite (CVE-2025-6965) * podman: Podman kube play command may overwrite host files (CVE-2025-9566) * libxml: Heap use after free (UAF) leads to Denial of service (DoS) (CVE-2025-49794) * libxml: Type confusion leads to Denial of service (DoS) (CVE-2025-49796) 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.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers security updates in Red Hat OpenShift Container Platform 4.18.27, which fixes six vulnerabilities: CVE-2025-5914 (libarchive double free), CVE-2025-5994 (unbound cache poisoning), CVE-2025-6965 (SQLite integer truncation), CVE-2025-9566 (Podman kube play command may overwrite host files), CVE-2025-49794 (libxml heap use after free leading to denial of service), and CVE-2025-49796 (libxml type confusion leading to denial of service). These vulnerabilities impact container images and RPM packages used in OpenShift 4.18 deployments. The advisory recommends upgrading to 4.18.27, which contains fixes for these issues. No CVSS scores are provided in the advisory, but the overall security impact is rated as Important by Red Hat Product Security.
Potential Impact
The vulnerabilities fixed in this update include memory corruption (double free, use after free), cache poisoning, integer truncation, and potential host file overwrite, which could lead to denial of service or unauthorized modification of host files. These issues could affect the stability, security, and integrity of OpenShift Container Platform deployments if left unpatched. The combined impact is considered high severity by the advisory.
Mitigation Recommendations
Red Hat OpenShift Container Platform 4.18 users should upgrade to version 4.18.27, which contains the necessary security fixes. Updates are available through the appropriate release channels and can be applied using the OpenShift CLI (oc) or web console. Detailed upgrade instructions are provided in the official Red Hat documentation. No additional mitigations are indicated beyond applying the 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-2025:19046
- Cve Count
- 6
- Additional Cves
- ["CVE-2025-5994","CVE-2025-6965","CVE-2025-9566","CVE-2025-49794","CVE-2025-49796"]
Threat ID: 6a1f4e87e29bf47b50080e39
Added to database: 06/02/2026, 21:43:35 UTC
Last enriched: 08/13/2026, 20:14:58 UTC
Last updated: 09/10/2026, 19:24:57 UTC
Views: 90
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.