Ubuntu Security Notices USN-8658-1 USN-8658-1: Linux kernel vulnerabilities Publication date 20 August 2026 Overview Several security issues were fixed in the Linux kernel. Releases 22.04 LTS 20.04 LTS Open side navigation Close side navigation Packages Details Update instructions References Related notices Packages linux - Linux kernel linux-aws - Linux kernel for Amazon Web Services (AWS) systems linux-aws-fips - Linux kernel for Amazon Web Services (AWS) systems with FIPS linux-azure-fips - Linux kernel for Microsoft Azure Cloud systems with FIPS linux-gkeop - Linux kernel for Google Container Engine (GKE) systems linux-ibm-5.15 - Linux kernel for IBM cloud systems linux-intel-iot-realtime - Linux kernel for Intel IoT Real-time platforms linux-intel-iotg - Linux kernel for Intel IoT platforms linux-intel-iotg-5.15 - Linux kernel for Intel IoT platforms linux-kvm - Linux kernel for cloud environments linux-nvidia - Linux kernel for NVIDIA systems linux-nvidia-tegra - Linux kernel for NVIDIA Tegra systems linux-nvidia-tegra-5.15 - Linux kernel for NVIDIA Tegra systems linux-oracle - Linux kernel for Oracle Cloud systems linux-oracle-5.15 - Linux kernel for Oracle Cloud systems linux-realtime - Linux kernel for Real-time systems linux-xilinx-zynqmp - Linux kernel for Xilinx ZynqMP processors 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: Open vSwitch; SCTP protocol 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: Open vSwitch; SCTP protocol 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-5.15.0-1066-nvidia-tegra – 5.15.0-1066.68 linux-image-5.15.0-1066-nvidia-tegra-rt – 5.15.0-1066.68 linux-image-5.15.0-1077-xilinx-zynqmp – 5.15.0-1077.81 linux-image-5.15.0-1097-gkeop – 5.15.0-1097.105 linux-image-5.15.0-1106-intel-iot-realtime – 5.15.0-1106.108 Real-time Real-time kernel available with Ubuntu Pro. linux-image-5.15.0-1106-kvm – 5.15.0-1106.111 linux-image-5.15.0-1109-intel-iotg – 5.15.0-1109.115 linux-image-5.15.0-1109-nvidia – 5.15.0-1109.110 linux-image-5.15.0-1109-nvidia-lowlatency – 5.15.0-1109.110 linux-image-5.15.0-1111-oracle – 5.15.0-1111.117 linux-image-5.15.0-1113-realtime – 5.15.0-1113.122 Real-time Real-time kernel available with Ubuntu Pro. linux-image-5.15.0-1114-aws – 5.15.0-1114.121 linux-image-5.15.0-1114-aws-64k – 5.15.0-1114.121 linux-image-5.15.0-1114-aws-fips – 5.15.0-1114.121+fips1 FIPS Updates FIPS-140 certified package with security fixes. Available with Ubuntu Pro. linux-image-5.15.0-1119-azure-fips – 5.15.0-1119.128+fips1 FIPS Updates FIPS-140 certified package with security fixes. Available with Ubuntu Pro. linux-image-5.15.0-190-generic – 5.15.0-190.200 linux-image-5.15.0-190-generic-64k – 5.15.0-190.200 linux-image-5.15.0-190-generic-lpae – 5.15.0-190.200 linux-image-aws-5.15 – 5.15.0.1114.117 linux-image-aws-64k-5.15 – 5.15.0.1114.117 linux-image-aws-64k-lts-22.04 – 5.15.0.1114.117 linux-image-aws-fips – 5.15.0.1114.110 FIPS Updates FIPS-140 certified package with security fixes. Available with Ubuntu Pro. linux-image-aws-fips-5.15 – 5.15.0.1114.110 FIPS Updates FIPS-140 certified package with security fixes. Available with Ubuntu Pro. linux-image-aws-lts-22.04 – 5.15.0.1114.117 linux-image-azure-fips – 5.15.0.1119.104 FIPS Updates FIPS-140 certified package with security fixes. Available with Ubuntu Pro. linux-image-azure-fips-5.15 – 5.15.0.1119.104 FIPS Updates FIPS-140 certified package with security fixes. Available with Ubuntu Pro. linux-image-generic – 5.15.0.190.169 linux-image-generic-5.15 – 5.15.0.190.169 linux-image-generic-64k – 5.15.0.190.169 linux-image-generic-64k-5.15 – 5.15.0.190.169 linux-image-generic-lpae – 5.15.0.190.169 linux-image-generic-lpae-5.15 – 5.15.0.190.169 linux-image-gkeop – 5.15.0.1097.96 linux-image-gkeop-5.15 – 5.15.0.1097.96 linux-image-intel-iot-realtime – 5.15.0.1106.110 Real-time Real-time kernel available with Ubuntu Pro. linux-image-intel-iot-realtime-5.15 – 5.15.0.1106.110 Real-time Real-time kernel available with Ubuntu Pro. linux-image-intel-iotg – 5.15.0.1109.108 linux-image-intel-iotg-5.15 – 5.15.0.1109.108 linux-image-kvm – 5.15.0.1106.102 linux-image-kvm-5.15 – 5.15.0.1106.102 linux-image-nvidia – 5.15.0.1109.109 linux-image-nvidia-5.15 – 5.15.0.1109.109 linux-image-nvidia-lowlatency – 5.15.0.1109.109 linux-image-nvidia-lowlatency-5.15 – 5.15.0.1109.109 linux-image-nvidia-tegra – 5.15.0.1066.66 linux-image-nvidia-tegra-5.15 – 5.15.0.1066.66 linux-image-nvidia-tegra-rt – 5.15.0.1066.66 linux-image-nvidia-tegra-rt-5.15 – 5.15.0.1066.66 linux-image-oracle-5.15 – 5.15.0.1111.107 linux-image-oracle-lts-22.04 – 5.15.0.1111.107 linux-image-realtime – 5.15.0.1113.117 Real-time Real-time kernel available with Ubuntu Pro. linux-image-realtime-5.15 – 5.15.0.1113.117 Real-time Real-time kernel available with Ubuntu Pro. linux-image-virtual – 5.15.0.190.169 linux-image-virtual-5.15 – 5.15.0.190.169 linux-image-xilinx-zynqmp – 5.15.0.1077.80 linux-image-xilinx-zynqmp-5.15 – 5.15.0.1077.80 20.04 LTS focal linux-image-5.15.0-1066-nvidia-tegra – 5.15.0-1066.68~20.04.1 Ubuntu Pro Fix available with Ubuntu Pro . linux-image-5.15.0-1066-nvidia-tegra-rt – 5.15.0-1066.68~20.04.1 Ubuntu Pro Fix available with Ubuntu Pro . linux-image-5.15.0-1108-ibm – 5.15.0-1108.112~20.04.1 Ubuntu Pro Fix available with Ubuntu Pro . linux-image-5.15.0-1109-intel-iotg – 5.15.0-1109.115~20.04.1 Ubuntu Pro Fix available with Ubuntu Pro . linux-image-5.15.0-1111-oracle – 5.15.0-1111.117~20.04.1 Ubuntu Pro Fix available with Ubuntu Pro . linux-image-ibm – 5.15.0.1108.112~20.04.1 Ubuntu Pro Fix available with Ubuntu Pro . linux-image-ibm-5.15 – 5.15.0.1108.112~20.04.1 Ubuntu Pro Fix available with Ubuntu Pro . linux-image-intel – 5.15.0.1109.115~20.04.1 Ubuntu Pro Fix available with Ubuntu Pro . linux-image-intel-iotg – 5.15.0.1109.115~20.04.1 Ubuntu Pro Fix available with Ubuntu Pro . linux-image-intel-iotg-5.15 – 5.15.0.1109.115~20.04.1 Ubuntu Pro Fix available with Ubuntu Pro . linux-image-nvidia-tegra – 5.15.0.1066.68~20.04.1 Ubuntu Pro Fix available with Ubuntu Pro . linux-image-nvidia-tegra-5.15 – 5.15.0.1066.68~20.04.1 Ubuntu Pro Fix available with Ubuntu Pro . linux-image-nvidia-tegra-rt – 5.15.0.1066.68~20.04.1 Ubuntu Pro Fix available with Ubuntu Pro . linux-image-nvidia-tegra-rt-5.15 – 5.15.0.1066.68~20.04.1 Ubuntu Pro Fix available with Ubuntu Pro . linux-image-oracle – 5.15.0.1111.117~20.04.1 Ubuntu Pro Fix available with Ubuntu Pro . linux-image-oracle-5.15 – 5.15.0.1111.117~20.04.1 Ubuntu Pro Fix 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-2026-64531 CVE-2026-53246 CVE-2026-53224 CVE-2026-64531 CVE-2026-53246 CVE-2026-53224 Related notices USN-8656-1 USN-8646-1 USN-8645-1 USN-8644-1 USN-8643-1 USN-8643-2 USN-8637-1 USN-8629-1 USN-8629-2 USN-8629-3 USN-8656-1 USN-8646-1 USN-8645-1 USN-8644-1 USN-8643-1 USN-8643-2 USN-8637-1 USN-8629-1 USN-8629-2 USN-8629-3 Have additional questions? Talk to a member of the team ›