--- title: 'USN-8636-1: 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-8636-1 --- 1. [Ubuntu Security Notices](https://ubuntu.com/security/notices) 2. USN-8636-1 --- # USN-8636-1: Linux kernel vulnerabilities Publication date 12 August 2026 Overview Several security issues were fixed in the Linux kernel. Releases [24.04 LTS](https://ubuntu.com/security/notices?release=noble) --- Open side navigation ## Packages * [linux-azure-6.17](https://ubuntu.com/security/cves?package=linux-azure-6.17) - Linux kernel for Microsoft Azure cloud systems * [linux-gcp-6.17](https://ubuntu.com/security/cves?package=linux-gcp-6.17) - Linux kernel for Google Cloud Platform (GCP) systems * [linux-hwe-6.17](https://ubuntu.com/security/cves?package=linux-hwe-6.17) - Linux hardware enablement (HWE) kernel * [linux-oem-6.17](https://ubuntu.com/security/cves?package=linux-oem-6.17) - Linux kernel for OEM systems * [linux-realtime-6.17](https://ubuntu.com/security/cves?package=linux-realtime-6.17) - Linux kernel for Real-time 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: * x86 architecture; * InfiniBand drivers; * Media drivers; * Network drivers; * Mellanox network drivers; * Texas Instruments network drivers; * NVME drivers; * File systems infrastructure; * SMB network file system; * IPv4 networking; * Network traffic control; * TCP network protocol; * Locking primitives; * Memory management; * IPv6 networking; * Multipath TCP; * Netfilter; * RxRPC session sockets; * 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 | | --- | --- | | 24.04 LTS noble | [linux-image-6.17.0-1019-realtime](https://launchpad.net/ubuntu/+source/linux-signed-realtime-6.17) –  6.17.0-1019.22   Real-time | | | | [linux-image-6.17.0-1022-azure](https://launchpad.net/ubuntu/+source/linux-signed-azure-6.17) –  [6.17.0-1022.22](https://launchpad.net/ubuntu/+source/linux-signed-azure-6.17/6.17.0-1022.22) | | | | [linux-image-6.17.0-1022-gcp](https://launchpad.net/ubuntu/+source/linux-signed-gcp-6.17) –  [6.17.0-1022.25](https://launchpad.net/ubuntu/+source/linux-signed-gcp-6.17/6.17.0-1022.25) | | | | [linux-image-6.17.0-1022-gcp-64k](https://launchpad.net/ubuntu/+source/linux-signed-gcp-6.17) –  [6.17.0-1022.25](https://launchpad.net/ubuntu/+source/linux-signed-gcp-6.17/6.17.0-1022.25) | | | | [linux-image-6.17.0-1032-oem](https://launchpad.net/ubuntu/+source/linux-signed-oem-6.17) –  [6.17.0-1032.32](https://launchpad.net/ubuntu/+source/linux-signed-oem-6.17/6.17.0-1032.32) | | | | [linux-image-6.17.0-42-generic](https://launchpad.net/ubuntu/+source/linux-signed-hwe-6.17) –  [6.17.0-42.42+1](https://launchpad.net/ubuntu/+source/linux-signed-hwe-6.17/6.17.0-42.42+1) | | | | [linux-image-6.17.0-42-generic-64k](https://launchpad.net/ubuntu/+source/linux-signed-hwe-6.17) –  [6.17.0-42.42+1](https://launchpad.net/ubuntu/+source/linux-signed-hwe-6.17/6.17.0-42.42+1) | | | | [linux-image-azure](https://launchpad.net/ubuntu/+source/linux-meta-azure-6.17) –  [6.17.0-1022.22](https://launchpad.net/ubuntu/+source/linux-meta-azure-6.17/6.17.0-1022.22) | | | | [linux-image-azure-6.17](https://launchpad.net/ubuntu/+source/linux-meta-azure-6.17) –  [6.17.0-1022.22](https://launchpad.net/ubuntu/+source/linux-meta-azure-6.17/6.17.0-1022.22) | | | | [linux-image-gcp](https://launchpad.net/ubuntu/+source/linux-meta-gcp-6.17) –  [6.17.0-1022.25](https://launchpad.net/ubuntu/+source/linux-meta-gcp-6.17/6.17.0-1022.25) | | | | [linux-image-gcp-6.17](https://launchpad.net/ubuntu/+source/linux-meta-gcp-6.17) –  [6.17.0-1022.25](https://launchpad.net/ubuntu/+source/linux-meta-gcp-6.17/6.17.0-1022.25) | | | | [linux-image-gcp-64k](https://launchpad.net/ubuntu/+source/linux-meta-gcp-6.17) –  [6.17.0-1022.25](https://launchpad.net/ubuntu/+source/linux-meta-gcp-6.17/6.17.0-1022.25) | | | | [linux-image-gcp-64k-6.17](https://launchpad.net/ubuntu/+source/linux-meta-gcp-6.17) –  [6.17.0-1022.25](https://launchpad.net/ubuntu/+source/linux-meta-gcp-6.17/6.17.0-1022.25) | | | | [linux-image-generic-6.17](https://launchpad.net/ubuntu/+source/linux-meta-hwe-6.17) –  [6.17.0-42.42](https://launchpad.net/ubuntu/+source/linux-meta-hwe-6.17/6.17.0-42.42) | | | | [linux-image-generic-64k-6.17](https://launchpad.net/ubuntu/+source/linux-meta-hwe-6.17) –  [6.17.0-42.42](https://launchpad.net/ubuntu/+source/linux-meta-hwe-6.17/6.17.0-42.42) | | | | [linux-image-oem-24.04](https://launchpad.net/ubuntu/+source/linux-meta-oem-6.17) –  [6.17.0-1032.32](https://launchpad.net/ubuntu/+source/linux-meta-oem-6.17/6.17.0-1032.32) | | | | [linux-image-oem-24.04a](https://launchpad.net/ubuntu/+source/linux-meta-oem-6.17) –  [6.17.0-1032.32](https://launchpad.net/ubuntu/+source/linux-meta-oem-6.17/6.17.0-1032.32) | | | | [linux-image-oem-24.04b](https://launchpad.net/ubuntu/+source/linux-meta-oem-6.17) –  [6.17.0-1032.32](https://launchpad.net/ubuntu/+source/linux-meta-oem-6.17/6.17.0-1032.32) | | | | [linux-image-oem-24.04c](https://launchpad.net/ubuntu/+source/linux-meta-oem-6.17) –  [6.17.0-1032.32](https://launchpad.net/ubuntu/+source/linux-meta-oem-6.17/6.17.0-1032.32) | | | | [linux-image-oem-24.04d](https://launchpad.net/ubuntu/+source/linux-meta-oem-6.17) –  [6.17.0-1032.32](https://launchpad.net/ubuntu/+source/linux-meta-oem-6.17/6.17.0-1032.32) | | | | [linux-image-oem-6.17](https://launchpad.net/ubuntu/+source/linux-meta-oem-6.17) –  [6.17.0-1032.32](https://launchpad.net/ubuntu/+source/linux-meta-oem-6.17/6.17.0-1032.32) | | | | [linux-image-realtime-6.17](https://launchpad.net/ubuntu/+source/linux-meta-realtime-6.17) –  6.17.0-1019.22   Real-time | | | | [linux-image-realtime-hwe-24.04](https://launchpad.net/ubuntu/+source/linux-meta-realtime-6.17) –  6.17.0-1019.22   Real-time | | | | [linux-image-virtual-6.17](https://launchpad.net/ubuntu/+source/linux-meta-hwe-6.17) –  [6.17.0-42.42](https://launchpad.net/ubuntu/+source/linux-meta-hwe-6.17/6.17.0-42.42) | | | --- ### 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-2026-53228](https://ubuntu.com/security/CVE-2026-53228) * [CVE-2026-53225](https://ubuntu.com/security/CVE-2026-53225) * [CVE-2026-53212](https://ubuntu.com/security/CVE-2026-53212) * [CVE-2026-53176](https://ubuntu.com/security/CVE-2026-53176) * [CVE-2026-53131](https://ubuntu.com/security/CVE-2026-53131) * [CVE-2026-53086](https://ubuntu.com/security/CVE-2026-53086) * [CVE-2026-52989](https://ubuntu.com/security/CVE-2026-52989) * [CVE-2026-52924](https://ubuntu.com/security/CVE-2026-52924) * [CVE-2026-46331](https://ubuntu.com/security/CVE-2026-46331) --- Show 14 more references ## Related notices id="usn" *Search* * [USN-8924-1](https://ubuntu.com/security/notices/USN-8924-1) * [USN-8922-1](https://ubuntu.com/security/notices/USN-8922-1) * [USN-8920-1](https://ubuntu.com/security/notices/USN-8920-1) * [USN-8906-1](https://ubuntu.com/security/notices/USN-8906-1) * [USN-8879-1](https://ubuntu.com/security/notices/USN-8879-1) * [USN-8878-1](https://ubuntu.com/security/notices/USN-8878-1) * [USN-8871-1](https://ubuntu.com/security/notices/USN-8871-1) * [USN-8864-1](https://ubuntu.com/security/notices/USN-8864-1) * [USN-8851-1](https://ubuntu.com/security/notices/USN-8851-1) * [USN-8851-2](https://ubuntu.com/security/notices/USN-8851-2) --- Show 100 more references --- Have additional questions? 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