Red Hat Product Errata RHSA-2026:56853 - Security Advisory
Issued:
2026-08-31
Updated:
2026-08-31

RHSA-2026:56853 - Security Advisory

Synopsis

Important: OpenShift Container Platform 4.16.69 bug fix and security update

Type/Severity

Security Advisory: Important

Topic

Red Hat OpenShift Container Platform release 4.16.69 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 4.16.

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

https://access.redhat.com/errata/RHSA-2026:56852

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/4.16/html/release_notes/

Security Fix(es):

  • kernel: Arm Processors: Privilege escalation or information disclosure

via writes to higher exception level resources (CVE-2025-10263)

  • 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: netfilter: flowtable: strictly check for maximum number of

actions (CVE-2026-43329)

  • kernel: net: openvswitch: reject oversized nested action attrs

(CVE-2026-64531)

  • icu: Stack buffer overflow in the SRBRoot::addTag function

(CVE-2025-5222)

  • kernel: KVM: x86: Don't (re)check L1 intercepts when completing userspace

I/O (CVE-2025-40026)

  • samba: vfs_worm 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 CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.

All OpenShift Container Platform 4.16 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/4.16/html-single/updating_clusters/index#updating-cluster-cli.

Solution

For OpenShift Container Platform 4.16 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/4.16/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
sha256:6153e72b10afb0a08ed75d928f51346b30407483477f14f3bcdbe9a0cac0286d

(For s390x architecture)
The image digest is
sha256:f32a58e7992cb8c99b0c46b13d49f4b0f9b4223bbf0dcb512b91a08f8f6db492

(For ppc64le architecture)
The image digest is
sha256:c8ae2207b3f6cbfb07f5cab88808f2e629808ab382900f60c61852125c2d3d96

(For aarch64 architecture)
The image digest is
sha256:7ef17710757c0ec0cd1022216237a48dbf029bdf5b0949ac8b6dbb91942c2050

All OpenShift Container Platform 4.16 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/4.16/html-single/updating_clusters/index#updating-cluster-cli.

Affected Products

  • Red Hat OpenShift Container Platform 4.16 for RHEL 9 x86_64
  • Red Hat OpenShift Container Platform for Power 4.16 for RHEL 9 ppc64le
  • Red Hat OpenShift Container Platform for IBM Z and LinuxONE 4.16 for RHEL 9 s390x
  • Red Hat OpenShift Container Platform for ARM 64 4.16 for RHEL 9 aarch64

Fixes

  • BZ - 2368600 - CVE-2025-5222 icu: Stack buffer overflow in the SRBRoot::addTag function
  • BZ - 2406712 - CVE-2025-40026 kernel: KVM: x86: Don't (re)check L1 intercepts when completing userspace I/O
  • BZ - 2447317 - CVE-2026-1933 samba: Missing access check on reparse point operations
  • BZ - 2447318 - CVE-2026-2340 samba: vfs_worm does not block directory modification
  • BZ - 2447319 - CVE-2026-3012 samba: group policy certificate enrollment uses http:// without validation
  • BZ - 2450624 - CVE-2026-33845 gnutls: GnuTLS: Denial of Service via DTLS zero-length fragment
  • BZ - 2450625 - CVE-2026-33846 gnutls: GnuTLS: Denial of Service via heap buffer overflow in DTLS handshake fragment reassembly
  • BZ - 2455400 - CVE-2026-34982 vim: arbitrary command execution via modeline sandbox bypass
  • BZ - 2455542 - CVE-2026-35177 vim: zip.vim: Vim zip.vim plugin: Arbitrary file overwrite via path traversal bypass
  • BZ - 2459853 - CVE-2026-5450 glibc: glibc: Heap Buffer Overflow in `scanf` with `%mc` format specifier and large width
  • BZ - 2460425 - CVE-2026-48864 libsolv: Heap buffer overflow in libsolv repopagestore via unchecked decompression of malicious .solv page data
  • BZ - 2461614 - CVE-2026-41411 vim: Vim: Command injection allows arbitrary code execution via malicious tag files
  • BZ - 2467279 - CVE-2026-42009 gnutls: gnutls: Denial of Service via DTLS packet reordering vulnerability
  • BZ - 2467289 - CVE-2026-42010 gnutls: gnutls: Authentication Bypass via NUL Character in Username
  • BZ - 2467437 - CVE-2026-42011 gnutls: gnutls: Security bypass due to incorrect name constraint handling
  • BZ - 2467448 - CVE-2026-42013 gnutls: gnutls: Certificate validation bypass due to oversized Subject Alternative Name
  • BZ - 2467450 - CVE-2026-5260 gnutls: gnutls: Information disclosure via heap overread in RSA key exchange
  • BZ - 2468124 - CVE-2026-43329 kernel: netfilter: flowtable: strictly check for maximum number of actions
  • BZ - 2477915 - CVE-2026-46483 vim: command injection when decompressing .tgz archives
  • BZ - 2479762 - CVE-2026-4408 samba: Remote Code Execution in SAMR
  • BZ - 2486958 - CVE-2025-10263 kernel: Arm Processors: Privilege escalation or information disclosure via writes to higher exception level resources
  • BZ - 2496556 - CVE-2026-14474 sssd: sssd: sudo LDAP provider searches entire directory tree for sudoRole objects by default, enabling privilege escalation
  • BZ - 2496581 - CVE-2026-14476 sssd: sssd: GPO cache path traversal via unsanitized gPCFileSysPath allows Kerberos authentication bypass
  • BZ - 2507402 - CVE-2026-64531 kernel: net: openvswitch: reject oversized nested action attrs

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