This advisory covers security fixes in Red Hat OpenShift Container Platform 4.17.12 for on-premise or private cloud Kubernetes deployments. The update addresses three main vulnerabilities: CVE-2024-21626, a file descriptor leak in runc; CVE-2024-45338, a parsing flaw in golang.org/x/net/html; and CVE-2024-50312, an information disclosure via GraphQL introspection. The advisory references updated container images and RPM packages, with upgrade instructions available from Red Hat. The vulnerabilities have been rated with a high severity impact, and the update is classified as important by Red Hat Product Security.

The vulnerabilities fixed include a file descriptor leak that could affect resource management (CVE-2024-21626), a parsing issue that may lead to unexpected behavior in HTML processing (CVE-2024-45338), and an information disclosure vulnerability through GraphQL introspection that could expose sensitive data (CVE-2024-50312). The CVSS vector for CVE-2024-21626 indicates high impact on confidentiality, integrity, and availability with local attack vector and low complexity. These issues could potentially compromise system stability and data confidentiality if exploited.

Red Hat has released OpenShift Container Platform 4.17.12 with fixes for these vulnerabilities. Users should upgrade to this version using the OpenShift CLI (oc) or the web console as soon as the updated packages and images are available in their release channel. Detailed upgrade instructions are provided by Red Hat at https://docs.openshift.com/container-platform/4.17/updating/updating_a_cluster/updating-cluster-cli.html. No alternative mitigations are indicated; applying the official update is the recommended remediation.