Ubuntu Security Notices USN-8148-4 USN-8148-4: Linux kernel (Real-time) vulnerabilities Publication date 6 April 2026 Overview Several security issues were fixed in the Linux kernel. Releases 24.04 LTS Open side navigation Close side navigation Packages Details Update instructions References Related notices Packages 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: Cryptographic API; Netfilter; Network traffic control 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: Cryptographic API; Netfilter; Network traffic control 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-6.17.0-1009-realtime – 6.17.0-1009.10~24.04.1 Real-time Real-time kernel available with Ubuntu Pro. linux-image-realtime-6.17 – 6.17.0-1009.10~24.04.1 Real-time Real-time kernel available with Ubuntu Pro. linux-image-realtime-hwe-24.04 – 6.17.0-1009.10~24.04.1 Real-time Real-time kernel available with 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 References CVE-2026-23111 CVE-2026-23074 CVE-2026-23060 CVE-2026-23111 CVE-2026-23074 CVE-2026-23060 Related notices USN-8152-1 USN-8149-1 USN-8148-1 USN-8148-2 USN-8148-3 USN-8145-1 USN-8145-2 USN-8145-3 USN-8143-1 USN-8143-2 USN-8152-1 USN-8149-1 USN-8148-1 USN-8148-2 USN-8148-3 USN-8145-1 USN-8145-2 USN-8145-3 USN-8143-1 USN-8143-2 USN-8142-1 Show 1 more references Show less references Have additional questions? Talk to a member of the team ›