Ubuntu alert USN-8851-1 (linux, linux-aws, linux-azure, linux-fips, linux-gcp, linux-gcp-5.4, linux-gcp-fips, linux-hwe-5.4, linux-iot, linux-kvm, linux-oracle, linux-oracle-5.4, linux-raspi, linux-xilinx-zynqmp)
| From: | noreply+usn-bot--- via ubuntu-security-announce <ubuntu-security-announce@lists.ubuntu.com> | |
| To: | ubuntu-security-announce@lists.ubuntu.com | |
| Subject: | [USN-8851-1] Linux kernel vulnerabilities | |
| Date: | Wed, 30 Sep 2026 10:12:37 +0000 | |
| Message-ID: | <E1xBrIj-00064F-Jx@lists.ubuntu.com> | |
| Cc: | noreply+usn-bot@canonical.com |
========================================================================== Ubuntu Security Notice USN-8851-1 September 30, 2026 linux, linux-aws, linux-azure, linux-fips, linux-gcp, linux-gcp-5.4, linux-gcp-fips, linux-hwe-5.4, linux-iot, linux-kvm, linux-oracle, linux-oracle-5.4, linux-raspi, 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-azure: Linux kernel for Microsoft Azure Cloud systems - 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-iot: Linux kernel for IoT platforms - linux-kvm: Linux kernel for cloud environments - linux-oracle: Linux kernel for Oracle Cloud systems - linux-raspi: Linux kernel for Raspberry Pi systems - linux-xilinx-zynqmp: Linux kernel for Xilinx ZynqMP processors - linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) systems - linux-hwe-5.4: Linux hardware enablement (HWE) kernel - 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 file system (NFS) server daemon; - IPv6 networking; - Netfilter; (CVE-2025-38724, CVE-2026-53131, CVE-2026-53221) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS linux-image-5.4.0-1068-iot 5.4.0-1068.71 Available with Ubuntu Pro linux-image-5.4.0-1082-xilinx-zynqmp 5.4.0-1082.86 Available with Ubuntu Pro linux-image-5.4.0-1138-fips 5.4.0-1138.148 Available with Ubuntu Pro linux-image-5.4.0-1147-raspi 5.4.0-1147.160 Available with Ubuntu Pro linux-image-5.4.0-1151-kvm 5.4.0-1151.160 Available with Ubuntu Pro linux-image-5.4.0-1162-oracle 5.4.0-1162.172 Available with Ubuntu Pro linux-image-5.4.0-1164-aws 5.4.0-1164.175 Available with Ubuntu Pro linux-image-5.4.0-1167-gcp 5.4.0-1167.177 Available with Ubuntu Pro linux-image-5.4.0-1167-gcp-fips 5.4.0-1167.176+fips1 Available with Ubuntu Pro linux-image-5.4.0-1169-azure 5.4.0-1169.175 Available with Ubuntu Pro linux-image-5.4.0-241-generic 5.4.0-241.261 Available with Ubuntu Pro linux-image-5.4.0-241-generic-lpae 5.4.0-241.261 Available with Ubuntu Pro linux-image-5.4.0-241-lowlatency 5.4.0-241.261 Available with Ubuntu Pro linux-image-aws-5.4 5.4.0.1164.162 Available with Ubuntu Pro linux-image-aws-lts-20.04 5.4.0.1164.162 Available with Ubuntu Pro linux-image-azure-5.4 5.4.0.1169.161 Available with Ubuntu Pro linux-image-azure-lts-20.04 5.4.0.1169.161 Available with Ubuntu Pro linux-image-fips 5.4.0.1138.135 Available with Ubuntu Pro linux-image-fips-5.4 5.4.0.1138.135 Available with Ubuntu Pro linux-image-gcp-5.4 5.4.0.1167.170 Available with Ubuntu Pro linux-image-gcp-fips 5.4.0.1167.109 Available with Ubuntu Pro linux-image-gcp-fips-5.4 5.4.0.1167.109 Available with Ubuntu Pro linux-image-gcp-lts-20.04 5.4.0.1167.170 Available with Ubuntu Pro linux-image-generic 5.4.0.241.233 Available with Ubuntu Pro linux-image-generic-5.4 5.4.0.241.233 Available with Ubuntu Pro linux-image-generic-lpae 5.4.0.241.233 Available with Ubuntu Pro linux-image-generic-lpae-5.4 5.4.0.241.233 Available with Ubuntu Pro linux-image-kvm 5.4.0.1151.147 Available with Ubuntu Pro linux-image-kvm-5.4 5.4.0.1151.147 Available with Ubuntu Pro linux-image-lowlatency 5.4.0.241.233 Available with Ubuntu Pro linux-image-lowlatency-5.4 5.4.0.241.233 Available with Ubuntu Pro linux-image-oem 5.4.0.241.233 Available with Ubuntu Pro linux-image-oem-osp1 5.4.0.241.233 Available with Ubuntu Pro linux-image-oracle-5.4 5.4.0.1162.156 Available with Ubuntu Pro linux-image-oracle-lts-20.04 5.4.0.1162.156 Available with Ubuntu Pro linux-image-raspi 5.4.0.1147.178 Available with Ubuntu Pro linux-image-raspi-5.4 5.4.0.1147.178 Available with Ubuntu Pro linux-image-raspi2 5.4.0.1147.178 Available with Ubuntu Pro linux-image-virtual 5.4.0.241.233 Available with Ubuntu Pro linux-image-virtual-5.4 5.4.0.241.233 Available with Ubuntu Pro linux-image-xilinx-zynqmp 5.4.0.1082.82 Available with Ubuntu Pro linux-image-xilinx-zynqmp-5.4 5.4.0.1082.82 Available with Ubuntu Pro Ubuntu 18.04 LTS linux-image-5.4.0-1162-oracle 5.4.0-1162.172~18.04.1 Available with Ubuntu Pro linux-image-5.4.0-1167-gcp 5.4.0-1167.176~18.04.1 Available with Ubuntu Pro linux-image-5.4.0-241-generic 5.4.0-241.261~18.04.1 Available with Ubuntu Pro linux-image-5.4.0-241-lowlatency 5.4.0-241.261~18.04.1 Available with Ubuntu Pro linux-image-gcp 5.4.0.1167.176~18.04.1 Available with Ubuntu Pro linux-image-gcp-5.4 5.4.0.1167.176~18.04.1 Available with Ubuntu Pro linux-image-generic-5.4 5.4.0.241.261~18.04.1 Available with Ubuntu Pro linux-image-generic-hwe-18.04 5.4.0.241.261~18.04.1 Available with Ubuntu Pro linux-image-lowlatency-5.4 5.4.0.241.261~18.04.1 Available with Ubuntu Pro linux-image-lowlatency-hwe-18.04 5.4.0.241.261~18.04.1 Available with Ubuntu Pro linux-image-oem 5.4.0.241.261~18.04.1 Available with Ubuntu Pro linux-image-oem-osp1 5.4.0.241.261~18.04.1 Available with Ubuntu Pro linux-image-oracle 5.4.0.1162.172~18.04.1 Available with Ubuntu Pro linux-image-oracle-5.4 5.4.0.1162.172~18.04.1 Available with Ubuntu Pro linux-image-snapdragon-5.4 5.4.0.241.261~18.04.1 Available with Ubuntu Pro linux-image-snapdragon-hwe-18.04 5.4.0.241.261~18.04.1 Available with Ubuntu Pro linux-image-virtual-5.4 5.4.0.241.261~18.04.1 Available with Ubuntu Pro linux-image-virtual-hwe-18.04 5.4.0.241.261~18.04.1 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-8851-1 CVE-2025-38724, CVE-2026-53131, CVE-2026-53221
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