Home / mailings [USN-9027-1] Linux kernel vulnerabilities
Posted on 10 November 2026
Ubuntu Security==========================================================================Ubuntu Security Notice USN-9027-1
November 10, 2026
linux, linux-aws, linux-aws-5.15, linux-aws-fips, linux-azure,
linux-azure-5.15, linux-azure-fde-5.15, linux-azure-fips, linux-gcp,
linux-gcp-5.15, linux-gcp-fips, linux-gke, linux-gkeop, linux-hwe-5.15,
linux-ibm, linux-ibm-5.15, linux-intel-iot-realtime, linux-intel-iotg,
linux-intel-iotg-5.15, linux-kvm, linux-lowlatency,
linux-lowlatency-hwe-5.15, linux-nvidia, linux-nvidia-tegra,
linux-nvidia-tegra-5.15, linux-oracle, linux-oracle-5.15, linux-realtime
vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description:
- 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: Linux kernel for Microsoft Azure Cloud systems
- linux-azure-fips: Linux kernel for Microsoft Azure Cloud systems with FIPS
- 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-intel-iotg: Linux kernel for Intel IoT platforms
- linux-kvm: Linux kernel for cloud environments
- linux-lowlatency: Linux low latency kernel
- linux-nvidia: Linux kernel for NVIDIA systems
- linux-nvidia-tegra: Linux kernel for NVIDIA Tegra systems
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-realtime: Linux kernel for Real-time systems
- linux-aws-5.15: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure-5.15: Linux kernel for Microsoft Azure cloud systems
- linux-azure-fde-5.15: Linux kernel for Microsoft Azure CVM cloud systems
- linux-gcp-5.15: Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe-5.15: Linux hardware enablement (HWE) kernel
- linux-ibm-5.15: Linux kernel for IBM cloud systems
- linux-intel-iotg-5.15: Linux kernel for Intel IoT platforms
- linux-lowlatency-hwe-5.15: Linux low latency kernel
- linux-nvidia-tegra-5.15: Linux kernel for NVIDIA Tegra systems
- linux-oracle-5.15: Linux kernel for Oracle Cloud 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:
- x86 architecture;
- Hardware monitoring drivers;
- OCFS2 file system;
- IPv4 networking;
- Ethernet bridge;
- Netfilter;
- XFRM subsystem;
(CVE-2025-21656, CVE-2026-63940, CVE-2026-74350, CVE-2026-98432,
CVE-2026-99999)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 22.04 LTS
linux-image-5.15.0-1071-nvidia-tegra 5.15.0-1071.73
linux-image-5.15.0-1071-nvidia-tegra-rt 5.15.0-1071.73
linux-image-5.15.0-1103-gkeop 5.15.0-1103.111
linux-image-5.15.0-1112-intel-iot-realtime 5.15.0-1112.116
Available with Ubuntu Pro
linux-image-5.15.0-1112-kvm 5.15.0-1112.117
linux-image-5.15.0-1114-ibm 5.15.0-1114.118
linux-image-5.15.0-1115-intel-iotg 5.15.0-1115.121
linux-image-5.15.0-1115-nvidia 5.15.0-1115.116
linux-image-5.15.0-1115-nvidia-lowlatency 5.15.0-1115.116
linux-image-5.15.0-1116-gke 5.15.0-1116.122
linux-image-5.15.0-1117-oracle 5.15.0-1117.123
linux-image-5.15.0-1119-realtime 5.15.0-1119.128
Available with Ubuntu Pro
linux-image-5.15.0-1120-aws 5.15.0-1120.127
linux-image-5.15.0-1120-aws-64k 5.15.0-1120.127
linux-image-5.15.0-1120-aws-fips 5.15.0-1120.127+fips1
Available with Ubuntu Pro
linux-image-5.15.0-1121-gcp 5.15.0-1121.131
linux-image-5.15.0-1121-gcp-fips 5.15.0-1121.131+fips1
Available with Ubuntu Pro
linux-image-5.15.0-1126-azure 5.15.0-1126.135
linux-image-5.15.0-1126-azure-fips 5.15.0-1126.135+fips1
Available with Ubuntu Pro
linux-image-5.15.0-198-lowlatency 5.15.0-198.208
linux-image-5.15.0-198-lowlatency-64k 5.15.0-198.208
linux-image-5.15.0-203-generic 5.15.0-203.213
linux-image-5.15.0-203-generic-64k 5.15.0-203.213
linux-image-5.15.0-203-generic-lpae 5.15.0-203.213
linux-image-aws-5.15 5.15.0.1120.123
linux-image-aws-64k-5.15 5.15.0.1120.123
linux-image-aws-64k-lts-22.04 5.15.0.1120.123
linux-image-aws-fips 5.15.0.1120.116
Available with Ubuntu Pro
linux-image-aws-fips-5.15 5.15.0.1120.116
Available with Ubuntu Pro
linux-image-aws-lts-22.04 5.15.0.1120.123
linux-image-azure-5.15 5.15.0.1126.124
linux-image-azure-fips 5.15.0.1126.110
Available with Ubuntu Pro
linux-image-azure-fips-5.15 5.15.0.1126.110
Available with Ubuntu Pro
linux-image-azure-lts-22.04 5.15.0.1126.124
linux-image-gcp-5.15 5.15.0.1121.118
linux-image-gcp-fips 5.15.0.1121.110
Available with Ubuntu Pro
linux-image-gcp-fips-5.15 5.15.0.1121.110
Available with Ubuntu Pro
linux-image-gcp-lts-22.04 5.15.0.1121.118
linux-image-generic 5.15.0.203.175
linux-image-generic-5.15 5.15.0.203.175
linux-image-generic-64k 5.15.0.203.175
linux-image-generic-64k-5.15 5.15.0.203.175
linux-image-generic-lpae 5.15.0.203.175
linux-image-generic-lpae-5.15 5.15.0.203.175
linux-image-gke 5.15.0.1116.115
linux-image-gke-5.15 5.15.0.1116.115
linux-image-gkeop 5.15.0.1103.102
linux-image-gkeop-5.15 5.15.0.1103.102
linux-image-ibm 5.15.0.1114.111
linux-image-ibm-5.15 5.15.0.1114.111
linux-image-intel-iot-realtime 5.15.0.1112.118
Available with Ubuntu Pro
linux-image-intel-iot-realtime-5.15 5.15.0.1112.118
Available with Ubuntu Pro
linux-image-intel-iotg 5.15.0.1115.114
linux-image-intel-iotg-5.15 5.15.0.1115.114
linux-image-kvm 5.15.0.1112.108
linux-image-kvm-5.15 5.15.0.1112.108
linux-image-lowlatency 5.15.0.198.163
linux-image-lowlatency-5.15 5.15.0.198.163
linux-image-lowlatency-64k 5.15.0.198.163
linux-image-lowlatency-64k-5.15 5.15.0.198.163
linux-image-nvidia 5.15.0.1115.115
linux-image-nvidia-5.15 5.15.0.1115.115
linux-image-nvidia-lowlatency 5.15.0.1115.115
linux-image-nvidia-lowlatency-5.15 5.15.0.1115.115
linux-image-nvidia-tegra 5.15.0.1071.71
linux-image-nvidia-tegra-5.15 5.15.0.1071.71
linux-image-nvidia-tegra-rt 5.15.0.1071.71
linux-image-nvidia-tegra-rt-5.15 5.15.0.1071.71
linux-image-oracle-5.15 5.15.0.1117.113
linux-image-oracle-lts-22.04 5.15.0.1117.113
linux-image-realtime 5.15.0.1119.123
Available with Ubuntu Pro
linux-image-realtime-5.15 5.15.0.1119.123
Available with Ubuntu Pro
linux-image-virtual 5.15.0.203.175
linux-image-virtual-5.15 5.15.0.203.175
Ubuntu 20.04 LTS
linux-image-5.15.0-1071-nvidia-tegra 5.15.0-1071.73~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-1071-nvidia-tegra-rt 5.15.0-1071.73~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-1114-ibm 5.15.0-1114.118~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-1115-intel-iotg 5.15.0-1115.121~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-1117-oracle 5.15.0-1117.123~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-1120-aws 5.15.0-1120.127~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-1121-gcp 5.15.0-1121.131~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-1125-azure-fde 5.15.0-1125.134~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-1126-azure 5.15.0-1126.135~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-198-lowlatency 5.15.0-198.208~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-198-lowlatency-64k 5.15.0-198.208~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-203-generic 5.15.0-203.213~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-203-generic-64k 5.15.0-203.213~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-203-generic-lpae 5.15.0-203.213~20.04.1
Available with Ubuntu Pro
linux-image-aws 5.15.0.1120.127~20.04.1
Available with Ubuntu Pro
linux-image-aws-5.15 5.15.0.1120.127~20.04.1
Available with Ubuntu Pro
linux-image-azure 5.15.0.1126.135~20.04.1
Available with Ubuntu Pro
linux-image-azure-5.15 5.15.0.1126.135~20.04.1
Available with Ubuntu Pro
linux-image-azure-cvm 5.15.0.1126.135~20.04.1
Available with Ubuntu Pro
linux-image-azure-fde 5.15.0.1125.134~20.04.1
Available with Ubuntu Pro
linux-image-azure-fde-5.15 5.15.0.1125.134~20.04.1
Available with Ubuntu Pro
linux-image-gcp 5.15.0.1121.131~20.04.1
Available with Ubuntu Pro
linux-image-gcp-5.15 5.15.0.1121.131~20.04.1
Available with Ubuntu Pro
linux-image-generic-5.15 5.15.0.203.213~20.04.1
Available with Ubuntu Pro
linux-image-generic-64k-5.15 5.15.0.203.213~20.04.1
Available with Ubuntu Pro
linux-image-generic-64k-hwe-20.04 5.15.0.203.213~20.04.1
Available with Ubuntu Pro
linux-image-generic-hwe-20.04 5.15.0.203.213~20.04.1
Available with Ubuntu Pro
linux-image-generic-lpae-5.15 5.15.0.203.213~20.04.1
Available with Ubuntu Pro
linux-image-generic-lpae-hwe-20.04 5.15.0.203.213~20.04.1
Available with Ubuntu Pro
linux-image-ibm 5.15.0.1114.118~20.04.1
Available with Ubuntu Pro
linux-image-ibm-5.15 5.15.0.1114.118~20.04.1
Available with Ubuntu Pro
linux-image-intel 5.15.0.1115.121~20.04.1
Available with Ubuntu Pro
linux-image-intel-iotg 5.15.0.1115.121~20.04.1
Available with Ubuntu Pro
linux-image-intel-iotg-5.15 5.15.0.1115.121~20.04.1
Available with Ubuntu Pro
linux-image-lowlatency-5.15 5.15.0.198.208~20.04.1
Available with Ubuntu Pro
linux-image-lowlatency-64k-5.15 5.15.0.198.208~20.04.1
Available with Ubuntu Pro
linux-image-lowlatency-64k-hwe-20.04 5.15.0.198.208~20.04.1
Available with Ubuntu Pro
linux-image-lowlatency-hwe-20.04 5.15.0.198.208~20.04.1
Available with Ubuntu Pro
linux-image-nvidia-tegra 5.15.0.1071.73~20.04.1
Available with Ubuntu Pro
linux-image-nvidia-tegra-5.15 5.15.0.1071.73~20.04.1
Available with Ubuntu Pro
linux-image-nvidia-tegra-rt 5.15.0.1071.73~20.04.1
Available with Ubuntu Pro
linux-image-nvidia-tegra-rt-5.15 5.15.0.1071.73~20.04.1
Available with Ubuntu Pro
linux-image-oem-20.04 5.15.0.203.213~20.04.1
Available with Ubuntu Pro
linux-image-oem-20.04b 5.15.0.203.213~20.04.1
Available with Ubuntu Pro
linux-image-oem-20.04c 5.15.0.203.213~20.04.1
Available with Ubuntu Pro
linux-image-oem-20.04d 5.15.0.203.213~20.04.1
Available with Ubuntu Pro
linux-image-oracle 5.15.0.1117.123~20.04.1
Available with Ubuntu Pro
linux-image-oracle-5.15 5.15.0.1117.123~20.04.1
Available with Ubuntu Pro
linux-image-virtual-5.15 5.15.0.203.213~20.04.1
Available with Ubuntu Pro
linux-image-virtual-hwe-20.04 5.15.0.203.213~20.04.1
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-9027-1
CVE-2025-21656, CVE-2026-63940, CVE-2026-74350, CVE-2026-98432,
CVE-2026-99999
Package Information:
https://launchpad.net/ubuntu/+source/linux/5.15.0-203.213
https://launchpad.net/ubuntu/+source/linux-aws/5.15.0-1120.127
https://launchpad.net/ubuntu/+source/linux-aws-fips/5.15.0-1120.127+fips1
https://launchpad.net/ubuntu/+source/linux-azure/5.15.0-1126.135
https://launchpad.net/ubuntu/+source/linux-azure-fips/5.15.0-1126.135+fips1
https://launchpad.net/ubuntu/+source/linux-gcp/5.15.0-1121.131
https://launchpad.net/ubuntu/+source/linux-gcp-fips/5.15.0-1121.131+fips1
https://launchpad.net/ubuntu/+source/linux-gke/5.15.0-1116.122
https://launchpad.net/ubuntu/+source/linux-gkeop/5.15.0-1103.111
https://launchpad.net/ubuntu/+source/linux-ibm/5.15.0-1114.118
https://launchpad.net/ubuntu/+source/linux-intel-iot-realtime/5.15.0-1112.116
https://launchpad.net/ubuntu/+source/linux-intel-iotg/5.15.0-1115.121
https://launchpad.net/ubuntu/+source/linux-kvm/5.15.0-1112.117
https://launchpad.net/ubuntu/+source/linux-lowlatency/5.15.0-198.208
https://launchpad.net/ubuntu/+source/linux-nvidia/5.15.0-1115.116
https://launchpad.net/ubuntu/+source/linux-nvidia-tegra/5.15.0-1071.73
https://launchpad.net/ubuntu/+source/linux-oracle/5.15.0-1117.123
https://launchpad.net/ubuntu/+source/linux-realtime/5.15.0-1119.128
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