Ubuntu Security Notices USN-8659-2 USN-8659-2: Linux kernel (HWE) vulnerability Publication date 21 August 2026 Overview A security issue was fixed in the Linux kernel. Releases 24.04 LTS Open side navigation Close side navigation Packages Details Update instructions References Related notices Packages linux-hwe-7.0 - Linux hardware enablement (HWE) kernel Details A security issue was discovered in the Linux kernel. An attacker could possibly use this to compromise the system. This update corrects flaws in the following subsystems: Open vSwitch A security issue was discovered in the Linux kernel. An attacker could possibly use this to compromise the system. This update corrects flaws in the following subsystems: Open vSwitch 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. 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-7.0.0-30-generic – 7.0.0-30.30~24.04.1 linux-image-7.0.0-30-generic-64k – 7.0.0-30.30~24.04.1 linux-image-generic-64k-7.0 – 7.0.0-30.30~24.04.1 linux-image-generic-64k-hwe-24.04 – 7.0.0-30.30~24.04.1 linux-image-generic-7.0 – 7.0.0-30.30~24.04.1 linux-image-generic-hwe-24.04 – 7.0.0-30.30~24.04.1 linux-image-virtual-7.0 – 7.0.0-30.30~24.04.1 linux-image-virtual-hwe-24.04 – 7.0.0-30.30~24.04.1 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 References CVE-2026-64531 CVE-2026-64531 Related notices USN-8661-1 USN-8660-1 USN-8659-1 USN-8658-1 USN-8656-1 USN-8643-1 USN-8643-2 USN-8661-1 USN-8660-1 USN-8659-1 USN-8658-1 USN-8656-1 USN-8643-1 USN-8643-2 Have additional questions? Talk to a member of the team ›