Red Hat released a batch of security advisories for RHEL 8, 9, and 10 addressing vulnerabilities in core components like httpd:2.4, acl, glibc, kernel, libtiff, evince, postgresql:13, rhc-worker-playbook, and kernel-rt. The OpenShift Container Platform also received multiple releases with version-specific fixes, including updates for 4.20.30, 4.21.25, and 4.22.6 to resolve bugs and patch security issues rated as Important severity. Red Hat Product Security assigned CVSS base scores to each vulnerability listed in the references section, helping administrators prioritize remediation efforts across their infrastructure.

RHSA-2026:42828: Important: httpd:2.4 security, bug fix, and enhancement update
RHSA-2026:42739: Important: acl security update
RHSA-2026:42875: Important: RHEL AI 3.5 RPM runtime CVE fix - aom
RHSA-2026:42733: Moderate: glibc security update
RHSA-2026:40779: Important: OpenShift Container Platform 4.21.25 bug fix and security update
RHSA-2026:42694: Moderate: glibc security update
RHSA-2026:42668: Important: libtiff security update
RHSA-2026:42692: Important: evince security update
RHSA-2026:42552: Important: kernel security, bug fix, and enhancement update
RHSA-2026:42555: Important: postgresql:13 security update
RHSA-2026:42550: Important: kernel-rt security, bug fix, and enhancement update
RHSA-2026:42946: Important: rhc-worker-playbook security, bug fix, and enhancement update
RHSA-2026:42919: Important: kernel security, bug fix, and enhancement update
RHSA-2026:42736: Important: acl security update
RHSA-2026:40787: Important: OpenShift Container Platform 4.20.30 bug fix and security update
RHSA-2026:40764: Important: OpenShift Container Platform 4.22.6 bug fix and security update

RHSA-2026:42828: Important: httpd:2.4 security, bug fix, and enhancement update

An update for the httpd:2.4 module is now available for Red Hat Enterprise Linux 8.

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.

RHSA-2026:42828: Important: httpd:2.4 security, bug fix, and enhancement update

RHSA-2026:42739: Important: acl security update

An update for acl is now available for Red Hat Enterprise Linux 10.

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.

RHSA-2026:42739: Important: acl security update

RHSA-2026:42875: Important: RHEL AI 3.5 RPM runtime CVE fix - aom

AIPCC Security Alerts identified CVEs in the 3.5 release of base-images. The CVE(s) are listed with a severity level of "Important" or higher.

RHSA-2026:42875: Important: RHEL AI 3.5 RPM runtime CVE fix - aom

RHSA-2026:42733: Moderate: glibc security update

An update for glibc is now available for Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact of Moderate. 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.

RHSA-2026:42733: Moderate: glibc security update

RHSA-2026:40779: Important: OpenShift Container Platform 4.21.25 bug fix and security update

Red Hat OpenShift Container Platform release 4.21.25 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 4.21.

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.

RHSA-2026:40779: Important: OpenShift Container Platform 4.21.25 bug fix and security update

RHSA-2026:42694: Moderate: glibc security update

An update for glibc is now available for Red Hat Enterprise Linux 10.

Red Hat Product Security has rated this update as having a security impact of Moderate. 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.

RHSA-2026:42694: Moderate: glibc security update

RHSA-2026:42668: Important: libtiff security update

An update for libtiff is now available for Red Hat Enterprise Linux 9.

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.

RHSA-2026:42668: Important: libtiff security update

RHSA-2026:42692: Important: evince security update

An update for evince is now available for Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Service.

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.

RHSA-2026:42692: Important: evince security update

RHSA-2026:42552: Important: kernel security, bug fix, and enhancement update

An update for kernel is now available for Red Hat Enterprise Linux 8.

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.

RHSA-2026:42552: Important: kernel security, bug fix, and enhancement update

RHSA-2026:42555: Important: postgresql:13 security update

An update for the postgresql:13 module is now available for Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Service.

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.

RHSA-2026:42555: Important: postgresql:13 security update

RHSA-2026:42550: Important: kernel-rt security, bug fix, and enhancement update

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.

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.

RHSA-2026:42550: Important: kernel-rt security, bug fix, and enhancement update

RHSA-2026:42946: Important: rhc-worker-playbook security, bug fix, and enhancement update

An update for rhc-worker-playbook is now available for Red Hat Enterprise Linux 10.

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.

RHSA-2026:42946: Important: rhc-worker-playbook security, bug fix, and enhancement update

RHSA-2026:42919: Important: kernel security, bug fix, and enhancement update

An update for kernel is now available for Red Hat Enterprise Linux 10.

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.

RHSA-2026:42919: Important: kernel security, bug fix, and enhancement update

RHSA-2026:42736: Important: acl security update

An update for acl is now available for Red Hat Enterprise Linux 9.

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.

RHSA-2026:42736: Important: acl security update

RHSA-2026:40787: Important: OpenShift Container Platform 4.20.30 bug fix and security update

Red Hat OpenShift Container Platform release 4.20.30 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 4.20.

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.

RHSA-2026:40787: Important: OpenShift Container Platform 4.20.30 bug fix and security update

RHSA-2026:40764: Important: OpenShift Container Platform 4.22.6 bug fix and security update

Red Hat OpenShift Container Platform release 4.22.6 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 4.22.

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.

RHSA-2026:40764: Important: OpenShift Container Platform 4.22.6 bug fix and security update