Ubuntu Security Notices USN-8159-3 USN-8159-3: Linux kernel (Real-time) vulnerabilities Publication date 8 April 2026 Overview Several security issues were fixed in the Linux kernel. Releases 22.04 LTS Open side navigation Close side navigation Packages Details Update instructions References Related notices Packages linux-realtime - 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: ARM64 architecture; 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: ARM64 architecture; 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 22.04 LTS jammy linux-image-5.15.0-1103-realtime – 5.15.0-1103.112 Real-time Real-time kernel available with Ubuntu Pro. linux-image-realtime – 5.15.0.1103.107 Real-time Real-time kernel available with Ubuntu Pro. linux-image-realtime-5.15 – 5.15.0.1103.107 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-2025-37849 CVE-2026-23111 CVE-2026-23074 CVE-2026-23060 CVE-2025-37849 Related notices Search id="usn" Close Search USN-8159-1 USN-8159-2 USN-8152-1 USN-8149-1 USN-8148-1 USN-8148-2 USN-8148-3 USN-8148-4 USN-8145-1 USN-8145-2 USN-8159-1 USN-8159-2 USN-8152-1 USN-8149-1 USN-8148-1 USN-8148-2 USN-8148-3 USN-8148-4 USN-8145-1 USN-8145-2 USN-8145-3 USN-8143-1 USN-8143-2 USN-8142-1 USN-8126-1 USN-8074-1 USN-8074-2 USN-8052-1 USN-8052-2 USN-8031-1 USN-8031-2 USN-8031-3 USN-8028-1 USN-8028-2 USN-8028-3 USN-8028-4 USN-8028-5 USN-8028-6 USN-8028-7 USN-8028-8 USN-7594-1 USN-7594-2 USN-7594-3 Show 23 more references Show less references Have additional questions? Talk to a member of the team ›