--- title: 'USN-8634-1: Linux kernel 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-8634-1 --- 1. [Ubuntu Security Notices](https://ubuntu.com/security/notices) 2. USN-8634-1 --- # USN-8634-1: Linux kernel vulnerabilities Publication date 12 August 2026 Overview Several security issues were fixed in the Linux kernel. Releases [14.04 LTS](https://ubuntu.com/security/notices?release=trusty) --- Open side navigation ## Packages * [linux](https://ubuntu.com/security/cves?package=linux) - Linux kernel ## 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: * x86 architecture; * Cryptographic API; * InfiniBand drivers; * Media drivers; * STMicroelectronics network drivers; * Network drivers; * Ext4 file system; * IPv4 networking; * TCP network protocol; * Locking primitives; * B.A.T.M.A.N. meshing protocol; * Ceph Core library; * IPv6 networking; * Multipath TCP; * Netfilter; * SCTP protocol; * SMC sockets ## 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 | | --- | --- | | 14.04 LTS trusty | [linux-image-3.13.0-215-generic](https://launchpad.net/ubuntu/+source/linux-signed) –  3.13.0-215.266   Ubuntu Pro | | | | [linux-image-3.13.0-215-lowlatency](https://launchpad.net/ubuntu/+source/linux-signed) –  3.13.0-215.266   Ubuntu Pro | | | | [linux-image-generic](https://launchpad.net/ubuntu/+source/linux-meta) –  3.13.0.215.225   Ubuntu Pro | | | | [linux-image-generic-lts-trusty](https://launchpad.net/ubuntu/+source/linux-meta) –  3.13.0.215.225   Ubuntu Pro | | | | [linux-image-lowlatency](https://launchpad.net/ubuntu/+source/linux-meta) –  3.13.0.215.225   Ubuntu Pro | | | | [linux-image-server](https://launchpad.net/ubuntu/+source/linux-meta) –  3.13.0.215.225   Ubuntu Pro | | | | [linux-image-virtual](https://launchpad.net/ubuntu/+source/linux-meta) –  3.13.0.215.225   Ubuntu Pro | | | --- ### 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-2026-53359](https://ubuntu.com/security/CVE-2026-53359) * [CVE-2026-53225](https://ubuntu.com/security/CVE-2026-53225) * [CVE-2026-53176](https://ubuntu.com/security/CVE-2026-53176) * [CVE-2026-52986](https://ubuntu.com/security/CVE-2026-52986) * [CVE-2026-52982](https://ubuntu.com/security/CVE-2026-52982) * [CVE-2026-52955](https://ubuntu.com/security/CVE-2026-52955) * [CVE-2026-46266](https://ubuntu.com/security/CVE-2026-46266) * [CVE-2026-43499](https://ubuntu.com/security/CVE-2026-43499) * [CVE-2026-43493](https://ubuntu.com/security/CVE-2026-43493) * [CVE-2026-43198](https://ubuntu.com/security/CVE-2026-43198) --- Show 6 more references ## Related notices id="usn" *Search* * [USN-8911-1](https://ubuntu.com/security/notices/USN-8911-1) * [USN-8850-1](https://ubuntu.com/security/notices/USN-8850-1) * [USN-8748-1](https://ubuntu.com/security/notices/USN-8748-1) * [USN-8728-1](https://ubuntu.com/security/notices/USN-8728-1) * [USN-8728-2](https://ubuntu.com/security/notices/USN-8728-2) * [USN-8728-3](https://ubuntu.com/security/notices/USN-8728-3) * [USN-8715-1](https://ubuntu.com/security/notices/USN-8715-1) * [USN-8715-2](https://ubuntu.com/security/notices/USN-8715-2) * [USN-8714-1](https://ubuntu.com/security/notices/USN-8714-1) * [USN-8714-2](https://ubuntu.com/security/notices/USN-8714-2) --- Show 107 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)