RHSA-2026:74428HighCVSS 8.3

Red Hat Security Advisory: OpenShift Container Platform 4.22.17 bug fix and security update

Published
October 6, 2026
Last Modified
October 6, 2026

🔗 CVE IDs covered (6)

CVE-2026-89846 →CVE-2026-63385 →CVE-2026-80844 →CVE-2026-81000 →CVE-2026-81634 →CVE-2026-82717 →

📋 Description

CVE-2026-63385 — libevent: Libevent: HTTP header handling bugs create risk of access control bypass. CVE-2026-80844 — kernel: xfrm: ah6: validate routing header segments_left CVE-2026-81000 — kernel: net: tun: bound receive headroom CVE-2026-81634 — unbound: Unbound: Heap buffer overflow via malicious DNSSEC response CVE-2026-82717 — unbound: Unbound: Remote Code Execution Vulnerability in CNAME Synthesis CVE-2026-89846 — kernel: scsi: qla2xxx: Bound rsp_info_len to avoid OOB sense-data read

🎯 Affected products5

  • Red Hat OpenShift Container Platform 4.22
  • rhcos-aarch64-4.22.9.8.202609291947-0 as a component of Red Hat OpenShift Container Platform 4.22
  • rhcos-ppc64le-4.22.9.8.202609291947-0 as a component of Red Hat OpenShift Container Platform 4.22
  • rhcos-s390x-4.22.9.8.202609291947-0 as a component of Red Hat OpenShift Container Platform 4.22
  • rhcos-x86_64-4.22.9.8.202609291947-0 as a component of Red Hat OpenShift Container Platform 4.22

✅ Remediation

For OpenShift Container Platform 4.22 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/4.22/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 sha256:9bde31879df303de7db7c100878393a520215f33815d0d9b188e3b4436c876a7 (For s390x architecture) The image digest is sha256:41d57f38fe018b5dcfb3698eb4630f406ec7546f67819d55acd134c3a2e5827a (For ppc64le architecture) The image digest is sha256:160d848722ca2e69777f512ff36adbd5485854b9905e0813aceecf83d549f5a2 (For aarch64 architecture) The image digest is sha256:b040b4af870284b4fcec18283bac700a5d3a0162cec2101a235dfa9a5f005b14 All OpenShift Container Platform 4.22 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/4.22/html-single/updating_clusters/index#updating-cluster-cli. 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. Workaround: See the security bulletin for a detailed mitigation procedure. Workaround: To mitigate this restrict Unbound to trusted clients and limit which upstream name servers it can query. If Unbound is unused, disable or remove the service. Apply process/cgroup limits to contain crash impact. Workaround: If QLogic Fibre Channel HBAs are not in use, the 'qla2xxx' kernel module can be blacklisted to prevent it from loading. This can be achieved by creating a modprobe configuration file. To blacklist the module: 1. Create a file named `/etc/modprobe.d/blacklist-qla2xxx.conf` with the following content: `blacklist qla2xxx` 2. Regenerate the initramfs to ensure the blacklist is applied during boot: `sudo dracut -f -v` (for RHEL 7/8/9) `sudo mkinitcpio -P` (for Arch-based systems, if applicable) 3. Reboot the system for the changes to take effect. Warning: Blacklisting this module will disable functionality for QLogic Fibre Channel HBAs. Ensure that this hardware is not required before applying this mitigation. A system reboot is required for the changes to take effect.

🔗 References (9)