RHSA-2026:57483: Important: OpenShift Container Platform 4.18.54 bug fix and security update

Red Hat OpenShift Container Platform is Red Hat's cloud computingKubernetes application platform solution designed for on-premise or privatecloud deployments.This advisory contains the container images for Red Hat OpenShift ContainerPlatform 4.18.54. See the following advisory for the RPM packages for thisrelease:https://access.redhat.com/errata/RHSA-2026:57482 Space precludes documenting all of the container images in this advisory.See the following Release Notes documentation, which will be updatedshortly for this release, for details about these changes:https://docs.redhat.com/en/documentation/openshiftcontainerplatform/4.18/html/releasenotes/ Security Fix(es): samba: Missing access check on reparse point operations (CVE-2026-1933) samba: group policy certificate enrollment uses http:// without validation (CVE-2026-3012) samba: Remote Code Execution in SAMR (CVE-2026-4408) sssd: sssd: sudo LDAP provider searches entire directory tree for sudoRole objects by default, enabling privilege escalation (CVE-2026-14474) gnutls: GnuTLS: Denial of Service via DTLS zero-length fragment (CVE-2026-33845) gnutls: GnuTLS: Denial of Service via heap buffer overflow in DTLS handshake fragment reassembly (CVE-2026-33846) vim: arbitrary command execution via modeline sandbox bypass (CVE-2026-34982) gnutls: gnutls: Denial of Service via DTLS packet reordering vulnerability (CVE-2026-42009) gnutls: gnutls: Authentication Bypass via NUL Character in Username (CVE-2026-42010) kernel: net: openvswitch: reject oversized nested action attrs (CVE-2026-64531) samba: vfsworm does not block directory modification (CVE-2026-2340) gnutls: gnutls: Information disclosure via heap overread in RSA key exchange (CVE-2026-5260) glibc: glibc: Heap Buffer Overflow in scanf with %mc format specifier and large width (CVE-2026-5450) sssd: sssd: GPO cache path traversal via unsanitized gPCFileSysPath allows Kerberos authentication bypass (CVE-2026-14476) vim: zip.vim: Vim zip.vim plugin: Arbitrary file overwrite via path traversal bypass (CVE-2026-35177) vim: Vim: Command injection allows arbitrary code execution via malicious tag files (CVE-2026-41411) gnutls: gnutls: Security bypass due to incorrect name constraint handling (CVE-2026-42011) gnutls: gnutls: Certificate validation bypass due to oversized Subject Alternative Name (CVE-2026-42013) vim: command injection when decompressing .tgz archives (CVE-2026-46483) libsolv: Heap buffer overflow in libsolv repopagestore via unchecked decompression of malicious .solv page data (CVE-2026-48864)For more details about the security issue(s), including the impact, a CVSSscore, acknowledgments, and other related information, refer to the CVEpage(s) listed in the References section.All OpenShift Container Platform 4.18 users are advised to upgrade to theseupdated packages and images when they are available in the appropriaterelease channel. To check for available updates, use the OpenShift CLI (oc)or web console. Instructions for upgrading a cluster are available athttps://docs.redhat.com/en/documentation/openshiftcontainerplatform/4.18/html-single/updatingclusters/index#updating-cluster-cli.

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