--- title: 'USN-7819-2: Linux kernel (Azure FIPS) vulnerabilities | Ubuntu security notices' description: Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things. url: https://ubuntu.com/security/notices/USN-7819-2 --- 1. [Ubuntu Security Notices](https://ubuntu.com/security/notices) 2. USN-7819-2 --- # USN-7819-2: Linux kernel (Azure FIPS) vulnerabilities Publication date 21 October 2025 Overview Several security issues were fixed in the Linux kernel. Releases [20.04 LTS](https://ubuntu.com/security/notices?release=focal) --- Open side navigation ## Packages * [linux-azure-fips](https://ubuntu.com/security/cves?package=linux-azure-fips) - Linux kernel for Microsoft Azure Cloud systems with FIPS ## 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; * Device tree and open firmware driver; * SCSI subsystem; * TTY drivers; * Ext4 file system; * Network file system (NFS) server daemon; * SMB network file system; * Bluetooth subsystem; * Packet sockets; * Network traffic control; * VMware vSockets driver ## Update instructions After a standard system update you need to reboot your computer to make all the necessary changes. [Learn more about how to get the fixes.](https://ubuntu.com/security/cves/about#security) 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. The problem can be corrected by updating your system to the following package versions: | Ubuntu Release | Package Version | | --- | --- | | 20.04 LTS focal | [linux-image-5.4.0-1155-azure-fips](https://launchpad.net/ubuntu/+source/linux-signed-azure-fips) –  5.4.0-1155.162+fips1   FIPS Updates | | | | [linux-image-azure-fips](https://launchpad.net/ubuntu/+source/linux-meta-azure-fips) –  5.4.0.1155.92   FIPS Updates | | | | [linux-image-azure-fips-5.4](https://launchpad.net/ubuntu/+source/linux-meta-azure-fips) –  5.4.0.1155.92   FIPS Updates | | | --- ### Reduce your security exposure Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines. [Get Ubuntu Pro](https://ubuntu.com/pro) ## References * [CVE-2025-38683](https://ubuntu.com/security/CVE-2025-38683) * [CVE-2025-38618](https://ubuntu.com/security/CVE-2025-38618) * [CVE-2025-38617](https://ubuntu.com/security/CVE-2025-38617) * [CVE-2025-38477](https://ubuntu.com/security/CVE-2025-38477) * [CVE-2025-38350](https://ubuntu.com/security/CVE-2025-38350) * [CVE-2025-38083](https://ubuntu.com/security/CVE-2025-38083) * [CVE-2025-37797](https://ubuntu.com/security/CVE-2025-37797) * [CVE-2025-37785](https://ubuntu.com/security/CVE-2025-37785) * [CVE-2025-37752](https://ubuntu.com/security/CVE-2025-37752) * [CVE-2025-21796](https://ubuntu.com/security/CVE-2025-21796) --- Show 6 more references ## Related notices id="usn" *Search* * [USN-8052-1](https://ubuntu.com/security/notices/USN-8052-1) * [USN-8052-2](https://ubuntu.com/security/notices/USN-8052-2) * [USN-8031-1](https://ubuntu.com/security/notices/USN-8031-1) * [USN-8031-2](https://ubuntu.com/security/notices/USN-8031-2) * [USN-8031-3](https://ubuntu.com/security/notices/USN-8031-3) * [USN-8028-1](https://ubuntu.com/security/notices/USN-8028-1) * [USN-8028-2](https://ubuntu.com/security/notices/USN-8028-2) * [USN-8028-3](https://ubuntu.com/security/notices/USN-8028-3) * [USN-8028-4](https://ubuntu.com/security/notices/USN-8028-4) * [USN-8028-5](https://ubuntu.com/security/notices/USN-8028-5) --- Show 197 more references --- Have additional questions? [Talk to a member of the team ›](https://wiki.ubuntu.com/SecurityTeam/FAQ?_ga=2.242131138.1744859116.1742138161-1500419473.1726851136&_gl=1*161muja*_gcl_au*MzUyMTIzNjI1LjE3MzYyNDQ4NTE.#Contact)