========================================================================== Ubuntu Security Notice USN-8273-1 May 19, 2026 linux, linux-aws, linux-aws-5.4, linux-aws-fips, linux-azure, linux-azure-5.4, linux-azure-fips, linux-bluefield, linux-fips, linux-gcp, linux-gcp-5.4, linux-gcp-fips, linux-hwe-5.4, linux-ibm, linux-ibm-5.4, linux-iot, linux-kvm, linux-oracle, linux-oracle-5.4, linux-xilinx-zynqmp vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux: Linux kernel - linux-aws: Linux kernel for Amazon Web Services (AWS) systems - linux-aws-fips: Linux kernel for Amazon Web Services (AWS) systems with FIPS - linux-azure: Linux kernel for Microsoft Azure Cloud systems - linux-azure-fips: Linux kernel for Microsoft Azure Cloud systems with FIPS - linux-bluefield: Linux kernel for NVIDIA BlueField platforms - linux-fips: Linux kernel with FIPS - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-gcp-fips: Linux kernel for Google Cloud Platform (GCP) systems with FIPS - linux-ibm: Linux kernel for IBM cloud systems - linux-iot: Linux kernel for IoT platforms - linux-kvm: Linux kernel for cloud environments - linux-oracle: Linux kernel for Oracle Cloud systems - linux-xilinx-zynqmp: Linux kernel for Xilinx ZynqMP processors - linux-aws-5.4: Linux kernel for Amazon Web Services (AWS) systems - linux-azure-5.4: Linux kernel for Microsoft Azure cloud systems - linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) systems - linux-hwe-5.4: Linux hardware enablement (HWE) kernel - linux-ibm-5.4: Linux kernel for IBM cloud systems - linux-oracle-5.4: Linux kernel for Oracle Cloud systems Details: Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - Network drivers; - NVME drivers; - IPv4 networking; (CVE-2024-50304, CVE-2026-23112, CVE-2026-23209) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS linux-image-5.4.0-1062-iot 5.4.0-1062.65 Available with Ubuntu Pro linux-image-5.4.0-1076-xilinx-zynqmp 5.4.0-1076.80 Available with Ubuntu Pro linux-image-5.4.0-1104-ibm 5.4.0-1104.109 Available with Ubuntu Pro linux-image-5.4.0-1117-bluefield 5.4.0-1117.124 Available with Ubuntu Pro linux-image-5.4.0-1132-fips 5.4.0-1132.142 Available with Ubuntu Pro linux-image-5.4.0-1145-kvm 5.4.0-1145.154 Available with Ubuntu Pro linux-image-5.4.0-1156-oracle 5.4.0-1156.166 Available with Ubuntu Pro linux-image-5.4.0-1158-aws 5.4.0-1158.168 Available with Ubuntu Pro linux-image-5.4.0-1158-aws-fips 5.4.0-1158.168+fips1 Available with Ubuntu Pro linux-image-5.4.0-1161-gcp 5.4.0-1161.170 Available with Ubuntu Pro linux-image-5.4.0-1161-gcp-fips 5.4.0-1161.170+fips1 Available with Ubuntu Pro linux-image-5.4.0-1162-azure 5.4.0-1162.168 Available with Ubuntu Pro linux-image-5.4.0-1162-azure-fips 5.4.0-1162.168+fips1 Available with Ubuntu Pro linux-image-5.4.0-229-generic 5.4.0-229.249 Available with Ubuntu Pro linux-image-5.4.0-229-generic-lpae 5.4.0-229.249 Available with Ubuntu Pro linux-image-5.4.0-229-lowlatency 5.4.0-229.249 Available with Ubuntu Pro linux-image-aws-5.4 5.4.0.1158.155 Available with Ubuntu Pro linux-image-aws-fips 5.4.0.1158.105 Available with Ubuntu Pro linux-image-aws-fips-5.4 5.4.0.1158.105 Available with Ubuntu Pro linux-image-aws-lts-20.04 5.4.0.1158.155 Available with Ubuntu Pro linux-image-azure-5.4 5.4.0.1162.154 Available with Ubuntu Pro linux-image-azure-fips 5.4.0.1162.98 Available with Ubuntu Pro linux-image-azure-fips-5.4 5.4.0.1162.98 Available with Ubuntu Pro linux-image-azure-lts-20.04 5.4.0.1162.154 Available with Ubuntu Pro linux-image-bluefield 5.4.0.1117.113 Available with Ubuntu Pro linux-image-bluefield-5.4 5.4.0.1117.113 Available with Ubuntu Pro linux-image-fips 5.4.0.1132.129 Available with Ubuntu Pro linux-image-fips-5.4 5.4.0.1132.129 Available with Ubuntu Pro linux-image-gcp-5.4 5.4.0.1161.163 Available with Ubuntu Pro linux-image-gcp-fips 5.4.0.1161.103 Available with Ubuntu Pro linux-image-gcp-fips-5.4 5.4.0.1161.103 Available with Ubuntu Pro linux-image-gcp-lts-20.04 5.4.0.1161.163 Available with Ubuntu Pro linux-image-generic 5.4.0.229.221 Available with Ubuntu Pro linux-image-generic-5.4 5.4.0.229.221 Available with Ubuntu Pro linux-image-generic-lpae 5.4.0.229.221 Available with Ubuntu Pro linux-image-generic-lpae-5.4 5.4.0.229.221 Available with Ubuntu Pro linux-image-ibm-5.4 5.4.0.1104.133 Available with Ubuntu Pro linux-image-ibm-lts-20.04 5.4.0.1104.133 Available with Ubuntu Pro linux-image-kvm 5.4.0.1145.141 Available with Ubuntu Pro linux-image-kvm-5.4 5.4.0.1145.141 Available with Ubuntu Pro linux-image-lowlatency 5.4.0.229.221 Available with Ubuntu Pro linux-image-lowlatency-5.4 5.4.0.229.221 Available with Ubuntu Pro linux-image-oem 5.4.0.229.221 Available with Ubuntu Pro linux-image-oem-osp1 5.4.0.229.221 Available with Ubuntu Pro linux-image-oracle-5.4 5.4.0.1156.150 Available with Ubuntu Pro linux-image-oracle-lts-20.04 5.4.0.1156.150 Available with Ubuntu Pro linux-image-virtual 5.4.0.229.221 Available with Ubuntu Pro linux-image-virtual-5.4 5.4.0.229.221 Available with Ubuntu Pro linux-image-xilinx-zynqmp 5.4.0.1076.76 Available with Ubuntu Pro linux-image-xilinx-zynqmp-5.4 5.4.0.1076.76 Available with Ubuntu Pro Ubuntu 18.04 LTS linux-image-5.4.0-1104-ibm 5.4.0-1104.109~18.04.1 Available with Ubuntu Pro linux-image-5.4.0-1156-oracle 5.4.0-1156.166~18.04.2+1 Available with Ubuntu Pro linux-image-5.4.0-1158-aws 5.4.0-1158.168~18.04.1 Available with Ubuntu Pro linux-image-5.4.0-1161-gcp 5.4.0-1161.170~18.04.1 Available with Ubuntu Pro linux-image-5.4.0-1162-azure 5.4.0-1162.168~18.04.1 Available with Ubuntu Pro linux-image-5.4.0-229-generic 5.4.0-229.249~18.04.1 Available with Ubuntu Pro linux-image-5.4.0-229-lowlatency 5.4.0-229.249~18.04.1 Available with Ubuntu Pro linux-image-aws 5.4.0.1158.168~18.04.1 Available with Ubuntu Pro linux-image-aws-5.4 5.4.0.1158.168~18.04.1 Available with Ubuntu Pro linux-image-azure 5.4.0.1162.168~18.04.1 Available with Ubuntu Pro linux-image-azure-5.4 5.4.0.1162.168~18.04.1 Available with Ubuntu Pro linux-image-gcp 5.4.0.1161.170~18.04.1 Available with Ubuntu Pro linux-image-gcp-5.4 5.4.0.1161.170~18.04.1 Available with Ubuntu Pro linux-image-generic-5.4 5.4.0.229.249~18.04.1 Available with Ubuntu Pro linux-image-generic-hwe-18.04 5.4.0.229.249~18.04.1 Available with Ubuntu Pro linux-image-ibm 5.4.0.1104.109~18.04.1 Available with Ubuntu Pro linux-image-ibm-5.4 5.4.0.1104.109~18.04.1 Available with Ubuntu Pro linux-image-lowlatency-5.4 5.4.0.229.249~18.04.1 Available with Ubuntu Pro linux-image-lowlatency-hwe-18.04 5.4.0.229.249~18.04.1 Available with Ubuntu Pro linux-image-oem 5.4.0.229.249~18.04.1 Available with Ubuntu Pro linux-image-oem-osp1 5.4.0.229.249~18.04.1 Available with Ubuntu Pro linux-image-oracle 5.4.0.1156.166~18.04.3 Available with Ubuntu Pro linux-image-oracle-5.4 5.4.0.1156.166~18.04.3 Available with Ubuntu Pro linux-image-snapdragon-5.4 5.4.0.229.249~18.04.1 Available with Ubuntu Pro linux-image-snapdragon-hwe-18.04 5.4.0.229.249~18.04.1 Available with Ubuntu Pro linux-image-virtual-5.4 5.4.0.229.249~18.04.1 Available with Ubuntu Pro linux-image-virtual-hwe-18.04 5.4.0.229.249~18.04.1 Available with Ubuntu Pro After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References: https://ubuntu.com/security/notices/USN-8273-1 CVE-2024-50304, CVE-2026-23112, CVE-2026-23209
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