Home / mailings [USN-8730-1] Linux kernel vulnerability
Posted on 07 September 2026
Ubuntu Security==========================================================================Ubuntu Security Notice USN-8730-1
September 07, 2026
linux, linux-gcp, linux-gcp-fips, linux-gke, linux-gkeop, linux-hwe-5.15,
linux-ibm, linux-ibm-5.15, linux-intel-iot-realtime, linux-lowlatency,
linux-lowlatency-hwe-5.15, linux-nvidia, linux-nvidia-tegra,
linux-nvidia-tegra-5.15, linux-realtime vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
Summary:
A security issue was fixed in the Linux kernel.
Software Description:
- linux: Linux kernel
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-gcp-fips: Linux kernel for Google Cloud Platform (GCP) systems with FIPS
- linux-gke: Linux kernel for Google Container Engine (GKE) systems
- linux-gkeop: Linux kernel for Google Container Engine (GKE) systems
- linux-ibm: Linux kernel for IBM cloud systems
- linux-intel-iot-realtime: Linux kernel for Intel IoT Real-time platforms
- linux-lowlatency: Linux low latency kernel
- linux-nvidia: Linux kernel for NVIDIA systems
- linux-nvidia-tegra: Linux kernel for NVIDIA Tegra systems
- linux-realtime: Linux kernel for Real-time systems
- linux-hwe-5.15: Linux hardware enablement (HWE) kernel
- linux-ibm-5.15: Linux kernel for IBM cloud systems
- linux-lowlatency-hwe-5.15: Linux low latency kernel
- linux-nvidia-tegra-5.15: Linux kernel for NVIDIA Tegra systems
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:
- IPv6 networking;
- Netfilter;
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 22.04 LTS
linux-image-5.15.0-1067-nvidia-tegra 5.15.0-1067.69
linux-image-5.15.0-1067-nvidia-tegra-rt 5.15.0-1067.69
linux-image-5.15.0-1098-gkeop 5.15.0-1098.106
linux-image-5.15.0-1107-intel-iot-realtime 5.15.0-1107.109
Available with Ubuntu Pro
linux-image-5.15.0-1109-ibm 5.15.0-1109.113
linux-image-5.15.0-1110-nvidia 5.15.0-1110.111
linux-image-5.15.0-1110-nvidia-lowlatency 5.15.0-1110.111
linux-image-5.15.0-1111-gke 5.15.0-1111.117
linux-image-5.15.0-1114-realtime 5.15.0-1114.123
Available with Ubuntu Pro
linux-image-5.15.0-1115-gcp 5.15.0-1115.125
linux-image-5.15.0-1115-gcp-fips 5.15.0-1115.125+fips1
Available with Ubuntu Pro
linux-image-5.15.0-191-generic 5.15.0-191.201
linux-image-5.15.0-191-generic-64k 5.15.0-191.201
linux-image-5.15.0-191-generic-lpae 5.15.0-191.201
linux-image-5.15.0-191-lowlatency 5.15.0-191.201
linux-image-5.15.0-191-lowlatency-64k 5.15.0-191.201
linux-image-gcp-5.15 5.15.0.1115.112
linux-image-gcp-fips 5.15.0.1115.105
Available with Ubuntu Pro
linux-image-gcp-fips-5.15 5.15.0.1115.105
Available with Ubuntu Pro
linux-image-gcp-lts-22.04 5.15.0.1115.112
linux-image-generic 5.15.0.191.169
linux-image-generic-5.15 5.15.0.191.169
linux-image-generic-64k 5.15.0.191.169
linux-image-generic-64k-5.15 5.15.0.191.169
linux-image-generic-lpae 5.15.0.191.169
linux-image-generic-lpae-5.15 5.15.0.191.169
linux-image-gke 5.15.0.1111.110
linux-image-gke-5.15 5.15.0.1111.110
linux-image-gkeop 5.15.0.1098.97
linux-image-gkeop-5.15 5.15.0.1098.97
linux-image-ibm 5.15.0.1109.106
linux-image-ibm-5.15 5.15.0.1109.106
linux-image-intel-iot-realtime 5.15.0.1107.111
Available with Ubuntu Pro
linux-image-intel-iot-realtime-5.15 5.15.0.1107.111
Available with Ubuntu Pro
linux-image-lowlatency 5.15.0.191.158
linux-image-lowlatency-5.15 5.15.0.191.158
linux-image-lowlatency-64k 5.15.0.191.158
linux-image-lowlatency-64k-5.15 5.15.0.191.158
linux-image-nvidia 5.15.0.1110.110
linux-image-nvidia-5.15 5.15.0.1110.110
linux-image-nvidia-lowlatency 5.15.0.1110.110
linux-image-nvidia-lowlatency-5.15 5.15.0.1110.110
linux-image-nvidia-tegra 5.15.0.1067.67
linux-image-nvidia-tegra-5.15 5.15.0.1067.67
linux-image-nvidia-tegra-rt 5.15.0.1067.67
linux-image-nvidia-tegra-rt-5.15 5.15.0.1067.67
linux-image-realtime 5.15.0.1114.118
Available with Ubuntu Pro
linux-image-realtime-5.15 5.15.0.1114.118
Available with Ubuntu Pro
linux-image-virtual 5.15.0.191.169
linux-image-virtual-5.15 5.15.0.191.169
Ubuntu 20.04 LTS
linux-image-5.15.0-1067-nvidia-tegra 5.15.0-1067.69~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-1067-nvidia-tegra-rt 5.15.0-1067.69~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-1109-ibm 5.15.0-1109.113~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-191-generic 5.15.0-191.201~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-191-generic-64k 5.15.0-191.201~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-191-generic-lpae 5.15.0-191.201~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-191-lowlatency 5.15.0-191.201~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-191-lowlatency-64k 5.15.0-191.201~20.04.1
Available with Ubuntu Pro
linux-image-generic-5.15 5.15.0.191.201~20.04.1
Available with Ubuntu Pro
linux-image-generic-64k-5.15 5.15.0.191.201~20.04.1
Available with Ubuntu Pro
linux-image-generic-64k-hwe-20.04 5.15.0.191.201~20.04.1
Available with Ubuntu Pro
linux-image-generic-hwe-20.04 5.15.0.191.201~20.04.1
Available with Ubuntu Pro
linux-image-generic-lpae-5.15 5.15.0.191.201~20.04.1
Available with Ubuntu Pro
linux-image-generic-lpae-hwe-20.04 5.15.0.191.201~20.04.1
Available with Ubuntu Pro
linux-image-ibm 5.15.0.1109.113~20.04.1
Available with Ubuntu Pro
linux-image-ibm-5.15 5.15.0.1109.113~20.04.1
Available with Ubuntu Pro
linux-image-lowlatency-5.15 5.15.0.191.201~20.04.1
Available with Ubuntu Pro
linux-image-lowlatency-64k-5.15 5.15.0.191.201~20.04.1
Available with Ubuntu Pro
linux-image-lowlatency-64k-hwe-20.04 5.15.0.191.201~20.04.1
Available with Ubuntu Pro
linux-image-lowlatency-hwe-20.04 5.15.0.191.201~20.04.1
Available with Ubuntu Pro
linux-image-nvidia-tegra 5.15.0.1067.69~20.04.1
Available with Ubuntu Pro
linux-image-nvidia-tegra-5.15 5.15.0.1067.69~20.04.1
Available with Ubuntu Pro
linux-image-nvidia-tegra-rt 5.15.0.1067.69~20.04.1
Available with Ubuntu Pro
linux-image-nvidia-tegra-rt-5.15 5.15.0.1067.69~20.04.1
Available with Ubuntu Pro
linux-image-oem-20.04 5.15.0.191.201~20.04.1
Available with Ubuntu Pro
linux-image-oem-20.04b 5.15.0.191.201~20.04.1
Available with Ubuntu Pro
linux-image-oem-20.04c 5.15.0.191.201~20.04.1
Available with Ubuntu Pro
linux-image-oem-20.04d 5.15.0.191.201~20.04.1
Available with Ubuntu Pro
linux-image-virtual-5.15 5.15.0.191.201~20.04.1
Available with Ubuntu Pro
linux-image-virtual-hwe-20.04 5.15.0.191.201~20.04.1
Available with Ubuntu Pro
After a standard system update you need to reboot your computer to make
all the necessary changes.
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.
References:
https://ubuntu.com/security/notices/USN-8730-1
CVE-2026-53131
Package Information:
https://launchpad.net/ubuntu/+source/linux/5.15.0-191.201
https://launchpad.net/ubuntu/+source/linux-gcp/5.15.0-1115.125
https://launchpad.net/ubuntu/+source/linux-gcp-fips/5.15.0-1115.125+fips1
https://launchpad.net/ubuntu/+source/linux-gke/5.15.0-1111.117
https://launchpad.net/ubuntu/+source/linux-gkeop/5.15.0-1098.106
https://launchpad.net/ubuntu/+source/linux-ibm/5.15.0-1109.113
https://launchpad.net/ubuntu/+source/linux-intel-iot-realtime/5.15.0-1107.109
https://launchpad.net/ubuntu/+source/linux-lowlatency/5.15.0-191.201
https://launchpad.net/ubuntu/+source/linux-nvidia/5.15.0-1110.111
https://launchpad.net/ubuntu/+source/linux-nvidia-tegra/5.15.0-1067.69
https://launchpad.net/ubuntu/+source/linux-realtime/5.15.0-1114.123
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