Ubuntu 20.04 LTS: Linux Kernel Critical Kernel Flaw Update USN-7795-1
ubuntu
October 2, 2025
Several security issues were fixed in the Linux kernel.
Summary
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-bluefield: Linux kernel for NVIDIA BlueField platforms - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-ibm: Linux kernel for IBM cloud systems - linux-iot: Linux kernel for IoT platforms - linux-kvm: Linux kernel for cloud environments - linux-raspi: Linux kernel for Raspberry Pi systems - linux-xilinx-zynqmp: Linux kernel for Xilinx ZynqMP processors - linux-aws-5.4: Linux kernel for Amazon Web Services (AWS) 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 Details: Several security issues were discovered in the Linux kernel. An a...
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Topics Covered
Update Instructions
The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS linux-image-5.4.0-1055-iot 5.4.0-1055.58 Available with Ubuntu Pro linux-image-5.4.0-1069-xilinx-zynqmp 5.4.0-1069.73 Available with Ubuntu Pro linux-image-5.4.0-1097-ibm 5.4.0-1097.102 Available with Ubuntu Pro linux-image-5.4.0-1110-bluefield 5.4.0-1110.117 Available with Ubuntu Pro linux-image-5.4.0-1134-raspi 5.4.0-1134.147 Available with Ubuntu Pro linux-image-5.4.0-1138-kvm 5.4.0-1138.147 Available with Ubuntu Pro linux-image-5.4.0-1151-aws 5.4.0-1151.161 Available with Ubuntu Pro linux-image-5.4.0-1154-gcp 5.4.0-1154.163 Available with Ubuntu Pro linux-image-5.4.0-222-generic 5.4.0-222.242 Available with Ubuntu Pro linux-image-5.4.0-222-generic-lpae 5.4.0-222.242 Available with Ubuntu Pro linux-image-5.4.0-222-lowlatency 5.4.0-222.242 Available with Ubuntu Pro linux-image-aws-5.4 5.4.0.1151.148 Available with Ubuntu Pro linux-image-aws-lts-20.04 5.4.0.1151.148 Available with Ubuntu Pro linux-image-bluefield 5.4.0.1110.106 Available with Ubuntu Pro linux-image-bluefield-5.4 5.4.0.1110.106 Available with Ubuntu Pro linux-image-gcp-5.4 5.4.0.1154.156 Available with Ubuntu Pro linux-image-gcp-lts-20.04 5.4.0.1154.156 Available with Ubuntu Pro linux-image-generic 5.4.0.222.214 Available with Ubuntu Pro linux-image-generic-5.4 5.4.0.222.214 Available with Ubuntu Pro linux-image-generic-lpae 5.4.0.222.214 Available with Ubuntu Pro linux-image-generic-lpae-5.4 5.4.0.222.214 Available with Ubuntu Pro linux-image-ibm-5.4 5.4.0.1097.126 Available with Ubuntu Pro linux-image-ibm-lts-20.04 5.4.0.1097.126 Available with Ubuntu Pro linux-image-kvm 5.4.0.1138.134 Available with Ubuntu Pro linux-image-kvm-5.4 5.4.0.1138.134 Available with Ubuntu Pro linux-image-lowlatency 5.4.0.222.214 Available with Ubuntu Pro linux-image-lowlatency-5.4 5.4.0.222.214 Available with Ubuntu Pro linux-image-oem 5.4.0.222.214 Available with Ubuntu Pro linux-image-oem-osp1 5.4.0.222.214 Available with Ubuntu Pro linux-image-raspi 5.4.0.1134.165 Available with Ubuntu Pro linux-image-raspi-5.4 5.4.0.1134.165 Available with Ubuntu Pro linux-image-raspi2 5.4.0.1134.165 Available with Ubuntu Pro linux-image-virtual 5.4.0.222.214 Available with Ubuntu Pro linux-image-virtual-5.4 5.4.0.222.214 Available with Ubuntu Pro linux-image-xilinx-zynqmp 5.4.0.1069.69 Available with Ubuntu Pro linux-image-xilinx-zynqmp-5.4 5.4.0.1069.69 Available with Ubuntu Pro Ubuntu 18.04 LTS linux-image-5.4.0-1097-ibm 5.4.0-1097.102~18.04.1 Available with Ubuntu Pro linux-image-5.4.0-1151-aws 5.4.0-1151.161~18.04.1 Available with Ubuntu Pro linux-image-5.4.0-1154-gcp 5.4.0-1154.163~18.04.1 Available with Ubuntu Pro linux-image-5.4.0-222-generic 5.4.0-222.242~18.04.1 Available with Ubuntu Pro linux-image-5.4.0-222-lowlatency 5.4.0-222.242~18.04.1 Available with Ubuntu Pro linux-image-aws 5.4.0.1151.161~18.04.1 Available with Ubuntu Pro linux-image-aws-5.4 5.4.0.1151.161~18.04.1 Available with Ubuntu Pro linux-image-gcp 5.4.0.1154.163~18.04.1 Available with Ubuntu Pro linux-image-gcp-5.4 5.4.0.1154.163~18.04.1 Available with Ubuntu Pro linux-image-generic-5.4 5.4.0.222.242~18.04.1 Available with Ubuntu Pro linux-image-generic-hwe-18.04 5.4.0.222.242~18.04.1 Available with Ubuntu Pro linux-image-ibm 5.4.0.1097.102~18.04.1 Available with Ubuntu Pro linux-image-ibm-5.4 5.4.0.1097.102~18.04.1 Available with Ubuntu Pro linux-image-lowlatency-5.4 5.4.0.222.242~18.04.1 Available with Ubuntu Pro linux-image-lowlatency-hwe-18.04 5.4.0.222.242~18.04.1 Available with Ubuntu Pro linux-image-oem 5.4.0.222.242~18.04.1 Available with Ubuntu Pro linux-image-oem-osp1 5.4.0.222.242~18.04.1 Available with Ubuntu Pro linux-image-snapdragon-5.4 5.4.0.222.242~18.04.1 Available with Ubuntu Pro linux-image-snapdragon-hwe-18.04 5.4.0.222.242~18.04.1 Available with Ubuntu Pro linux-image-virtual-5.4 5.4.0.222.242~18.04.1 Available with Ubuntu Pro linux-image-virtual-hwe-18.04 5.4.0.222.242~18.04.1 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-7795-1
CVE-2025-21796, CVE-2025-37785, CVE-2025-38477, CVE-2025-38617,
CVE-2025-38618
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Ubuntu Security Notice USN-7795-1
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