Red Hat Product Errata RHSA-2026:54883 - Security Advisory Issued: 2026-08-19 Updated: 2026-08-19 RHSA-2026:54883 - Security Advisory Overview Updated Packages Synopsis Important: Red Hat build of MicroShift 4.19.43 security update Type/Severity Security Advisory: Important Red Hat Lightspeed patch analysis Identify and remediate systems affected by this advisory. View affected systems Topic Red Hat build of MicroShift release 4.19.43 is now available with updates to packages and images that include a security update. 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 build of MicroShift is Red Hat's light-weight Kubernetes orchestration solution designed for edge device deployments and is built from the edge capabilities of Red Hat OpenShift Container Platform. MicroShift is an application that is deployed on top of Red Hat Enterprise Linux devices at the edge, providing an efficient way to operate single-node clusters in these low-resource environments. This advisory contains the RPM packages for Red Hat build of MicroShift 4.19.43. Read the following advisory for the container images for this release: https://access.redhat.com/errata/RHSA-2026:54555 Security Fix(es): net/mail: golang: Go net/mail: Denial of Service via crafted email inputs (CVE-2026-39820) All Red Hat build of MicroShift 4.19 users are advised to use these updated packages and images when they are available in the RPM repository. Solution For MicroShift 4.19, read the following documentation for important instructions on how to install the latest RPMs and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/red_hat_build_of_microshift/4.19/html/red_hat_build_of_microshift_release_notes/index Affected Products Red Hat OpenShift Container Platform 4.19 for RHEL 9 x86_64 Red Hat OpenShift Container Platform for Power 4.19 for RHEL 9 ppc64le Red Hat OpenShift Container Platform for IBM Z and LinuxONE 4.19 for RHEL 9 s390x Red Hat OpenShift Container Platform for ARM 64 4.19 for RHEL 9 aarch64 Fixes BZ - 2467820 - CVE-2026-39820 net/mail: golang: Go net/mail: Denial of Service via crafted email inputs CVEs CVE-2026-39820 References https://access.redhat.com/security/updates/classification/#important Note: More recent versions of these packages may be available. Click a package name for more details. Red Hat OpenShift Container Platform 4.19 for RHEL 9 SRPM microshift-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.src.rpm SHA-256: 5b7ab5d2178052827a23546ae2d4cd1299968f85c2b1fe1f1b744f34f13fedf0 x86_64 microshift-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.x86_64.rpm SHA-256: ad40a729f6941a22cc5f9af7b2ce5963fe7fb917e8eec61ab824512f741f979a microshift-ai-model-serving-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.x86_64.rpm SHA-256: 33a2ce35c303f88e46292c98abf44dc9caff26af78ef53c493a37e2eb2e04982 microshift-ai-model-serving-release-info-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: c5c32aeebf5e9cdc6df5673eb9ecfa3413eecfa8d3e32bea0a228294f96d6c09 microshift-gateway-api-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.x86_64.rpm SHA-256: a98eef7c28840ee0f4510a56371f8148218573b44256c9ee39ebf96b47e356f7 microshift-gateway-api-release-info-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: 55a83a478fbc486ec5d4ff3996dd8b0c90e4546cb73889c12ed757006c3eb701 microshift-greenboot-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: 272e9a42f03f8502644b1352628cf09412b67a238ec2986dfb0fb0f59f9e27b2 microshift-low-latency-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: c60aee05c9d5c7ecf516612176e79371013dc26eeb0570b62edba626bff208aa microshift-multus-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.x86_64.rpm SHA-256: cc9be8e81ea78a6fe476fe6d14202e683e7bb4bf6fb7049be26462a679329a64 microshift-multus-release-info-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: 8ebf48b12fe022c40c45a4df638cb90741aa9a6330c4483bbc1661ef1ecff33b microshift-networking-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.x86_64.rpm SHA-256: 5e59a851e408188d87eae4385eadb35752c876b02e19c652d4ea949c452c9053 microshift-observability-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: ac1696caf07ada14dd55499af898c77bf6209e35d1b0e090d18ebf918b67b3d4 microshift-olm-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.x86_64.rpm SHA-256: c863ed755c2a3570bd71afae965305b11ad20ebfdc1ff2c5a45952abc1d822be microshift-olm-release-info-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: 35964a0357a437535fe57841eebc956301ea23461fa4152a727e415fd9ee5ddf microshift-release-info-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: 2db480de2f95638afdfad9be2befe52045e892e4de6359ea6cdda3c4e89cd714 microshift-selinux-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: 131febc85cbfc16bb35aac9cf89f57f8039380195f9aac667bbc9c966fcd3eca Red Hat OpenShift Container Platform for Power 4.19 for RHEL 9 SRPM microshift-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.src.rpm SHA-256: 5b7ab5d2178052827a23546ae2d4cd1299968f85c2b1fe1f1b744f34f13fedf0 ppc64le microshift-ai-model-serving-release-info-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: c5c32aeebf5e9cdc6df5673eb9ecfa3413eecfa8d3e32bea0a228294f96d6c09 microshift-gateway-api-release-info-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: 55a83a478fbc486ec5d4ff3996dd8b0c90e4546cb73889c12ed757006c3eb701 microshift-greenboot-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: 272e9a42f03f8502644b1352628cf09412b67a238ec2986dfb0fb0f59f9e27b2 microshift-low-latency-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: c60aee05c9d5c7ecf516612176e79371013dc26eeb0570b62edba626bff208aa microshift-multus-release-info-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: 8ebf48b12fe022c40c45a4df638cb90741aa9a6330c4483bbc1661ef1ecff33b microshift-observability-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: ac1696caf07ada14dd55499af898c77bf6209e35d1b0e090d18ebf918b67b3d4 microshift-olm-release-info-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: 35964a0357a437535fe57841eebc956301ea23461fa4152a727e415fd9ee5ddf microshift-release-info-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: 2db480de2f95638afdfad9be2befe52045e892e4de6359ea6cdda3c4e89cd714 microshift-selinux-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: 131febc85cbfc16bb35aac9cf89f57f8039380195f9aac667bbc9c966fcd3eca Red Hat OpenShift Container Platform for IBM Z and LinuxONE 4.19 for RHEL 9 SRPM microshift-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.src.rpm SHA-256: 5b7ab5d2178052827a23546ae2d4cd1299968f85c2b1fe1f1b744f34f13fedf0 s390x microshift-ai-model-serving-release-info-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: c5c32aeebf5e9cdc6df5673eb9ecfa3413eecfa8d3e32bea0a228294f96d6c09 microshift-gateway-api-release-info-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: 55a83a478fbc486ec5d4ff3996dd8b0c90e4546cb73889c12ed757006c3eb701 microshift-greenboot-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: 272e9a42f03f8502644b1352628cf09412b67a238ec2986dfb0fb0f59f9e27b2 microshift-low-latency-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: c60aee05c9d5c7ecf516612176e79371013dc26eeb0570b62edba626bff208aa microshift-multus-release-info-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: 8ebf48b12fe022c40c45a4df638cb90741aa9a6330c4483bbc1661ef1ecff33b microshift-observability-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: ac1696caf07ada14dd55499af898c77bf6209e35d1b0e090d18ebf918b67b3d4 microshift-olm-release-info-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: 35964a0357a437535fe57841eebc956301ea23461fa4152a727e415fd9ee5ddf microshift-release-info-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: 2db480de2f95638afdfad9be2befe52045e892e4de6359ea6cdda3c4e89cd714 microshift-selinux-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: 131febc85cbfc16bb35aac9cf89f57f8039380195f9aac667bbc9c966fcd3eca Red Hat OpenShift Container Platform for ARM 64 4.19 for RHEL 9 SRPM microshift-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.src.rpm SHA-256: 5b7ab5d2178052827a23546ae2d4cd1299968f85c2b1fe1f1b744f34f13fedf0 aarch64 microshift-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.aarch64.rpm SHA-256: 2fb67838cbf180361a5351a36d1f3a2f0f9d580b4f4e77fb1f17927476d70786 microshift-ai-model-serving-release-info-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: c5c32aeebf5e9cdc6df5673eb9ecfa3413eecfa8d3e32bea0a228294f96d6c09 microshift-gateway-api-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.aarch64.rpm SHA-256: 0bc94928e7abc3dfade4e7d0220e158e7b3bda17633e25e9f2f55d246da3449f microshift-gateway-api-release-info-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: 55a83a478fbc486ec5d4ff3996dd8b0c90e4546cb73889c12ed757006c3eb701 microshift-greenboot-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: 272e9a42f03f8502644b1352628cf09412b67a238ec2986dfb0fb0f59f9e27b2 microshift-low-latency-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.noarch.rpm SHA-256: c60aee05c9d5c7ecf516612176e79371013dc26eeb0570b62edba626bff208aa microshift-multus-4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el9.aarch64.rpm SHA-256