Red Hat 9423 Published by

Red Hat recently published several security advisories that patch known vulnerabilities across its enterprise Linux distribution. System administrators will need to apply these fixes to core components including the kernel, Cockpit management interface, Xorg display server modules, Flatpak runtime environments, and Firefox web browser. The patches cover multiple release branches ranging from version 8 up to version 10 with most rated as important severity levels.

RHSA-2026:21718: Important: xorg-x11-server security update
RHSA-2026:21716: Important: xorg-x11-server-Xwayland security update
RHSA-2026:21712: Important: xorg-x11-server-Xwayland security update
RHSA-2026:21700: Important: cockpit security update
RHSA-2026:21699: Important: xorg-x11-server security update
RHSA-2026:21682: Important: python3.9 security update
RHSA-2026:21686: Moderate: libsoup security update
RHSA-2026:21676: Important: cockpit security update
RHSA-2026:21647: Important: cockpit security update
RHSA-2026:21556: Important: kernel security update
RHSA-2026:21755: Important: flatpak security update
RHSA-2026:21757: Important: flatpak security update
RHSA-2026:21756: Important: flatpak security update
RHSA-2026:21754: Important: .NET 9.0 security update
RHSA-2026:21745: Important: kernel-rt security update
RHSA-2026:21743: Important: firefox security update
RHSA-2026:21742: Important: xorg-x11-server security update
RHSA-2026:21741: Important: tigervnc security update
RHSA-2026:21392: Important: cockpit security update
RHSA-2026:21715: Important: xorg-x11-server security update
RHSA-2026:21706: Important: kernel security update




RHSA-2026:21718: Important: xorg-x11-server security update


An update for xorg-x11-server is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.6 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-2026:21718: Important: xorg-x11-server security update



RHSA-2026:21716: Important: xorg-x11-server-Xwayland security update


An update for xorg-x11-server-Xwayland is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.6 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-2026:21716: Important: xorg-x11-server-Xwayland security update



RHSA-2026:21712: Important: xorg-x11-server-Xwayland security update


An update for xorg-x11-server-Xwayland 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-2026:21712: Important: xorg-x11-server-Xwayland security update



RHSA-2026:21700: Important: cockpit security update


An update for cockpit is now available for Red Hat Enterprise Linux 8.10

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-2026:21700: Important: cockpit security update



RHSA-2026:21699: Important: xorg-x11-server security update


An update for xorg-x11-server is now available for Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions.

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-2026:21699: Important: xorg-x11-server security update



RHSA-2026:21682: Important: python3.9 security update


An update for python3.9 is now available for Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions.

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-2026:21682: Important: python3.9 security update



RHSA-2026:21686: Moderate: libsoup security update


An update for libsoup is now available for Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions.

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-2026:21686: Moderate: libsoup security update



RHSA-2026:21676: Important: cockpit security update


An update for cockpit 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-2026:21676: Important: cockpit security update



RHSA-2026:21647: Important: cockpit security update


An update for cockpit is now available for Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions.

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-2026:21647: Important: cockpit security update



RHSA-2026:21556: Important: kernel security update


An update for kernel 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-2026:21556: Important: kernel security update



RHSA-2026:21755: Important: flatpak security update


An update for flatpak 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-2026:21755: Important: flatpak security update



RHSA-2026:21757: Important: flatpak security update


An update for flatpak 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-2026:21757: Important: flatpak security update



RHSA-2026:21756: Important: flatpak security update


An update for flatpak 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-2026:21756: Important: flatpak security update



RHSA-2026:21754: Important: .NET 9.0 security update


An update for .NET 9.0 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-2026:21754: Important: .NET 9.0 security update



RHSA-2026:21745: Important: kernel-rt security 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-2026:21745: Important: kernel-rt security update



RHSA-2026:21743: Important: firefox security update


An update for firefox is now available for Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions.

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-2026:21743: Important: firefox security update



RHSA-2026:21742: Important: xorg-x11-server security update


An update for xorg-x11-server 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-2026:21742: Important: xorg-x11-server security update



RHSA-2026:21741: Important: tigervnc security update


An update for tigervnc is now available for Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions.

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-2026:21741: Important: tigervnc security update



RHSA-2026:21392: Important: cockpit security update


An update for cockpit 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-2026:21392: Important: cockpit security update



RHSA-2026:21715: Important: xorg-x11-server security update


An update for xorg-x11-server is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.

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-2026:21715: Important: xorg-x11-server security update



RHSA-2026:21706: Important: kernel security 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-2026:21706: Important: kernel security update