Red Hat Product Errata RHSA-2026:89725 - Security Advisory
Issued:
2026-10-27
Updated:
2026-10-27

RHSA-2026:89725 - Security Advisory

Synopsis

Critical: OpenShift Container Platform 4.18.59 bug fix and security update

Type/Severity

Security Advisory: Critical

Topic

Red Hat OpenShift Container Platform release 4.18.59 is now available with updates to packages and images that fix several bugs and add enhancements.

This release includes a security update for Red Hat OpenShift Container Platform 4.18.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

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 4.18.59. See the following advisory for the RPM packages for this release:

https://access.redhat.com/errata/RHSA-2026:89724

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):

  • kernel: netfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry (CVE-2026-43114)
  • acl: Symlink traversal privilege escalation via libacl functions (CVE-2026-54369)
  • openssh: OpenSSH sshd: Security bypass due to incorrect handling of forwarding and tunneling options (CVE-2026-59999)
  • openssh: OpenSSH: Use-after-free vulnerability during host key re-exchange on the client side (CVE-2026-60002)
  • kernel: sctp: don't free the ASCONF's own transport in DEL-IP processing (CVE-2026-64564)
  • kernel: pppoe: reload header pointer after dev_hard_header() (CVE-2026-68121)
  • kernel: ipv6: fix use-after-free in ip6_finish_output2() (CVE-2026-80792)
  • pcre2: PCRE2: Out-of-bounds write allows arbitrary code execution via crafted regular expressions (CVE-2026-86145)
  • pcre2: PCRE2: Memory corruption vulnerability in pcre2_jit_match (CVE-2026-89161)
  • pcre2: pcre2: Out-of-bounds write via crafted regular expression (CVE-2026-103111)
  • openssl: CMS AuthEnvelopedData Processing May Accept Forged Messages (CVE-2026-34182)
  • openssl: AES-OCB IV Ignored on EVP_Cipher() Path (CVE-2026-45445)
  • glib: off-by-one error in glib/gkeyfile.c via "g_key_file_get_locale_string_list" (CVE-2026-58014)
  • openssh: OpenSSH: sftp client allows attacker to control downloaded file location (CVE-2026-59995)
  • kernel: RDMA/rxe: Fix OOB in free_rd_atomic_resources() (CVE-2026-80863)
  • kernel: RDMA/rxe: Fix responder UAF on IB_QP_MAX_DEST_RD_ATOMIC modify_qp (CVE-2026-80864)
  • ca-certificates: Distrust eMudhra intermediate CA certificates due to security concerns (CVE-2026-114406)
  • kernel: ipv4: validate checksum_start before completing checksum (CVE-2026-99999)

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.

Solution

For OpenShift Container Platform 4.18 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/4.18/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:dabe7545163af58a2538c645725556acea531fdcfb83fd5aea9b7f28cd112c06

(For s390x architecture)
The image digest is sha256:37753fc25221075037cbca9e1c6f0e14f08f33cc86b668efbd5c1fb5453d7fc9

(For ppc64le architecture)
The image digest is sha256:7f5637b4be7768839c338e81312e9deb5c5b6f20a694e72f0746d4245d9e90fb

(For aarch64 architecture)
The image digest is sha256:22447d72c8c01d104946efa2e951a0c3fff37eb753d5c6ee7cf3ff3615c738d3

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 Products

  • Red Hat OpenShift Container Platform 4.18 for RHEL 9 x86_64
  • Red Hat OpenShift Container Platform 4.18 for RHEL 8 x86_64
  • Red Hat OpenShift Container Platform for Power 4.18 for RHEL 9 ppc64le
  • Red Hat OpenShift Container Platform for Power 4.18 for RHEL 8 ppc64le
  • Red Hat OpenShift Container Platform for IBM Z and LinuxONE 4.18 for RHEL 9 s390x
  • Red Hat OpenShift Container Platform for IBM Z and LinuxONE 4.18 for RHEL 8 s390x
  • Red Hat OpenShift Container Platform for ARM 64 4.18 for RHEL 9 aarch64
  • Red Hat OpenShift Container Platform for ARM 64 4.18 for RHEL 8 aarch64

Fixes

  • BZ - 2466994 - CVE-2026-43114 kernel: netfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry
  • BZ - 2481884 - CVE-2026-34182 openssl: CMS AuthEnvelopedData Processing May Accept Forged Messages
  • BZ - 2481896 - CVE-2026-45445 openssl: AES-OCB IV Ignored on EVP_Cipher() Path
  • BZ - 2490277 - CVE-2026-54369 acl: Symlink traversal privilege escalation via libacl functions
  • BZ - 2492255 - CVE-2026-58014 glib: off-by-one error in glib/gkeyfile.c via "g_key_file_get_locale_string_list"
  • BZ - 2497927 - CVE-2026-59995 openssh: OpenSSH: sftp client allows attacker to control downloaded file location
  • BZ - 2497936 - CVE-2026-60002 openssh: OpenSSH: Use-after-free vulnerability during host key re-exchange on the client side
  • BZ - 2497942 - CVE-2026-59999 openssh: OpenSSH sshd: Security bypass due to incorrect handling of forwarding and tunneling options
  • BZ - 2510890 - CVE-2026-64564 kernel: sctp: don't free the ASCONF's own transport in DEL-IP processing
  • BZ - 2513233 - CVE-2026-68121 kernel: pppoe: reload header pointer after dev_hard_header()
  • BZ - 2528542 - CVE-2026-80792 kernel: ipv6: fix use-after-free in ip6_finish_output2()
  • BZ - 2528646 - CVE-2026-80864 kernel: RDMA/rxe: Fix responder UAF on IB_QP_MAX_DEST_RD_ATOMIC modify_qp
  • BZ - 2528665 - CVE-2026-80863 kernel: RDMA/rxe: Fix OOB in free_rd_atomic_resources()
  • BZ - 2528993 - CVE-2026-86145 pcre2: PCRE2: Out-of-bounds write allows arbitrary code execution via crafted regular expressions
  • BZ - 2531747 - CVE-2026-89161 pcre2: PCRE2: Memory corruption vulnerability in pcre2_jit_match
  • BZ - 2543797 - CVE-2026-103111 pcre2: pcre2: Out-of-bounds write via crafted regular expression
  • BZ - 2553429 - CVE-2026-99999 kernel: ipv4: validate checksum_start before completing checksum
  • BZ - 2556046 - CVE-2026-114406 ca-certificates: Distrust eMudhra intermediate CA certificates due to security concerns

The Red Hat security contact is secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.