RHSA-2026:0978MediumCVSS 8.1

Red Hat Security Advisory: OpenShift Container Platform 4.20.12 bug fix and security update

Published
January 27, 2026
Last Modified
August 26, 2026

🔗 CVE IDs covered (3)

CVE-2025-11083 →CVE-2025-5987 →CVE-2025-9714 →

📋 Description

CVE-2025-5987 — libssh: Invalid return code for chacha20 poly1305 with OpenSSL backend CVE-2025-9714 — libxslt: libxml2: Inifinite recursion at exsltDynMapFunction function in libexslt/dynamic.c CVE-2025-11083 — binutils: GNU Binutils Linker heap-based overflow

🎯 Affected products5

  • Red Hat OpenShift Container Platform 4.20
  • rhcos-aarch64-4.20.9.6.202601211057-0 as a component of Red Hat OpenShift Container Platform 4.20
  • rhcos-ppc64le-4.20.9.6.202601211057-0 as a component of Red Hat OpenShift Container Platform 4.20
  • rhcos-s390x-4.20.9.6.202601211057-0 as a component of Red Hat OpenShift Container Platform 4.20
  • rhcos-x86_64-4.20.9.6.202601211057-0 as a component of Red Hat OpenShift Container Platform 4.20

✅ Remediation

For OpenShift Container Platform 4.20 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.20/html/release_notes/ You may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags. The sha values for the release are as follows: (For x86_64 architecture) The image digest is sha256:c9bae4933c711d664e15da5b98e6e057fda51697aef4f3ec8e932922aa969373 (For s390x architecture) The image digest is sha256:24efd2a05ad0aaff7f303ec7aceef23fbf2495c5bb122a2a177d69d51a18376a (For ppc64le architecture) The image digest is sha256:aa79662c0220879c8cde3314199265de32d0b6c420377f7ba9ed322f4657ce1c (For aarch64 architecture) The image digest is sha256:be52c63b0a81cb4a29f40f1a4554e6f11874d929d5c1a5f6f5fbcb3869525bf2 All OpenShift Container Platform 4.20 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/4.20/html-single/updating_clusters/index#updating-cluster-cli. Workaround: The impact of this flaw may be reduced by setting strict resource limits to the stack size of processes at the operational system level. This can be achieved either through the 'ulimit' shell built-in or the 'limits.conf' file. Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

🔗 References (6)