Red Hat Product Security just rolled out a fresh batch of advisories targeting core infrastructure components across multiple operating system versions. You will find critical fixes for MySQL, the Linux kernel, Postfix mail server, and WebKitGTK3 libraries scattered throughout RHEL 8, 9, and 10 releases. While most of these patches address Important level flaws, a handful tackle Moderate issues that still demand immediate attention from your team. IT managers need to schedule downtime carefully since applying these updates will directly impact system stability and overall security posture across extended support channels.

RHSA-2026:25919: Moderate: mysql:8.0 security update
RHSA-2026:25918: Important: webkit2gtk3 security update
RHSA-2026:25902: Important: fence-agents security update
RHSA-2026:25908: Important: kernel security update
RHSA-2026:25932: Important: postfix security update
RHSA-2026:25927: Important: webkit2gtk3 security update
RHSA-2026:25925: Important: valkey security update
RHSA-2026:25930: Important: postfix security update
RHSA-2026:25999: Moderate: yggdrasil-worker-package-manager security update
RHSA-2026:26054: Important: osbuild-composer security update
RHSA-2026:26008: Important: redis:6 security update
RHSA-2026:25979: Important: samba security update

RHSA-2026:25919: Moderate: mysql:8.0 security update

An update for the mysql:8.0 module 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-2026:25919: Moderate: mysql:8.0 security update

RHSA-2026:25918: Important: webkit2gtk3 security update

An update for webkit2gtk3 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-2026:25918: Important: webkit2gtk3 security update

RHSA-2026:25902: Important: fence-agents security update

An update for fence-agents 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-2026:25902: Important: fence-agents security update

RHSA-2026:25908: Important: kernel security update

An update for kernel is now available for Red Hat Enterprise Linux 10.0 Extended Update Support.

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-2026:25908: Important: kernel security update

RHSA-2026:25932: Important: postfix security update

An update for postfix 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-2026:25932: Important: postfix security update

RHSA-2026:25927: Important: webkit2gtk3 security update

An update for webkit2gtk3 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-2026:25927: Important: webkit2gtk3 security update

RHSA-2026:25925: Important: valkey security update

An update for valkey 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-2026:25925: Important: valkey security update

RHSA-2026:25930: Important: postfix security update

An update for postfix 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-2026:25930: Important: postfix security update

RHSA-2026:25999: Moderate: yggdrasil-worker-package-manager security update

An update for yggdrasil-worker-package-manager 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-2026:25999: Moderate: yggdrasil-worker-package-manager security update

RHSA-2026:26054: Important: osbuild-composer security update

An update for osbuild-composer is now available for Red Hat Enterprise Linux 9.6 Extended Update Support.

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-2026:26054: Important: osbuild-composer security update

RHSA-2026:26008: Important: redis:6 security update

An update for the redis:6 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-2026:26008: Important: redis:6 security update

RHSA-2026:25979: Important: samba security update

An update for samba is now available for Red Hat Enterprise Linux 9.6 Extended Update Support.

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-2026:25979: Important: samba security update