Home / mailings [USN-8817-1] Linux kernel vulnerabilities
Posted on 24 September 2026
Ubuntu Security==========================================================================Ubuntu Security Notice USN-8817-1
September 24, 2026
linux, linux-azure, linux-azure-6.8, linux-azure-fde, linux-azure-fde-6.8,
linux-azure-fips, linux-fips, linux-gcp, linux-gcp-6.8, linux-gcp-fips,
linux-gke, linux-gkeop, linux-ibm, linux-lowlatency,
linux-lowlatency-hwe-6.8, linux-oracle, linux-oracle-6.8, linux-raspi,
linux-raspi-realtime, linux-realtime, linux-realtime-6.8 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description:
- linux: Linux kernel
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-azure-fde: Linux kernel for Microsoft Azure CVM cloud systems
- linux-azure-fips: Linux kernel for Microsoft Azure Cloud systems with FIPS
- linux-fips: Linux kernel 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-lowlatency: Linux low latency kernel
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-raspi: Linux kernel for Raspberry Pi systems
- linux-raspi-realtime: Linux kernel for Raspberry Pi Real-time systems
- linux-realtime: Linux kernel for Real-time systems
- linux-azure-6.8: Linux kernel for Microsoft Azure cloud systems
- linux-azure-fde-6.8: Linux kernel for Microsoft Azure CVM cloud systems
- linux-gcp-6.8: Linux kernel for Google Cloud Platform (GCP) systems
- linux-lowlatency-hwe-6.8: Linux low latency kernel
- linux-oracle-6.8: Linux kernel for Oracle Cloud systems
- linux-realtime-6.8: Linux kernel for Real-time systems
Details:
It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
(CVE-2025-10263)
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;
- InfiniBand drivers;
- Network drivers;
- TCM subsystem;
- B.A.T.M.A.N. meshing protocol;
- HSR network protocol;
- IPv4 networking;
- IPv6 networking;
- Netfilter;
- RDS protocol;
(CVE-2026-53131, CVE-2026-53186, CVE-2026-53216, CVE-2026-53221,
CVE-2026-53354, CVE-2026-53355, CVE-2026-63886, CVE-2026-63887,
CVE-2026-63888, CVE-2026-63912, CVE-2026-63922, CVE-2026-63924,
CVE-2026-63984, CVE-2026-63992, CVE-2026-63993, CVE-2026-63994,
CVE-2026-64000, CVE-2026-64007, CVE-2026-64091)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 24.04 LTS
linux-image-6.8.0-1050-gkeop 6.8.0-1050.54
linux-image-6.8.0-1062-oracle 6.8.0-1062.65
linux-image-6.8.0-1062-oracle-64k 6.8.0-1062.65
linux-image-6.8.0-1064-gke 6.8.0-1064.72
linux-image-6.8.0-1064-gke-64k 6.8.0-1064.72
linux-image-6.8.0-1065-ibm 6.8.0-1065.66
linux-image-6.8.0-1065-raspi 6.8.0-1065.69
linux-image-6.8.0-1066-azure-fde 6.8.0-1066.73
linux-image-6.8.0-1068-azure 6.8.0-1068.76
linux-image-6.8.0-1068-azure-fips 6.8.0-1068.76+fips1
Available with Ubuntu Pro
linux-image-6.8.0-1068-gcp-fips 6.8.0-1068.76+fips1
Available with Ubuntu Pro
linux-image-6.8.0-1069-gcp 6.8.0-1069.77
linux-image-6.8.0-1069-gcp-64k 6.8.0-1069.77
linux-image-6.8.0-142-fips 6.8.0-142.142+fips1
Available with Ubuntu Pro
linux-image-6.8.0-142-generic 6.8.0-142.142
linux-image-6.8.0-142-generic-64k 6.8.0-142.142
linux-image-6.8.0-142-lowlatency 6.8.0-142.142.1
linux-image-6.8.0-142-lowlatency-64k 6.8.0-142.142.1
linux-image-6.8.0-2054-raspi-realtime 6.8.0-2054.56
Available with Ubuntu Pro
linux-image-6.8.1-1060-realtime 6.8.1-1060.61
Available with Ubuntu Pro
linux-image-azure-6.8 6.8.0-1068.76
linux-image-azure-fde-6.8 6.8.0-1066.73
linux-image-azure-fde-lts-24.04 6.8.0-1066.73
linux-image-azure-fips 6.8.0-1068.76+fips1
Available with Ubuntu Pro
linux-image-azure-fips-6.8 6.8.0-1068.76+fips1
Available with Ubuntu Pro
linux-image-azure-lts-24.04 6.8.0-1068.76
linux-image-fips 6.8.0-142.142+fips1
Available with Ubuntu Pro
linux-image-fips-6.8 6.8.0-142.142+fips1
Available with Ubuntu Pro
linux-image-gcp-6.8 6.8.0-1069.77
linux-image-gcp-64k-6.8 6.8.0-1069.77
linux-image-gcp-64k-lts-24.04 6.8.0-1069.77
linux-image-gcp-fips 6.8.0-1068.76+fips1
Available with Ubuntu Pro
linux-image-gcp-fips-6.8 6.8.0-1068.76+fips1
Available with Ubuntu Pro
linux-image-gcp-lts-24.04 6.8.0-1069.77
linux-image-generic 6.8.0-142.142
linux-image-generic-6.8 6.8.0-142.142
linux-image-generic-64k 6.8.0-142.142
linux-image-generic-64k-6.8 6.8.0-142.142
linux-image-generic-lpae 6.8.0-142.142
linux-image-gke 6.8.0-1064.72
linux-image-gke-6.8 6.8.0-1064.72
linux-image-gke-64k 6.8.0-1064.72
linux-image-gke-64k-6.8 6.8.0-1064.72
linux-image-gkeop 6.8.0-1050.54
linux-image-gkeop-6.8 6.8.0-1050.54
linux-image-ibm 6.8.0-1065.66
linux-image-ibm-6.8 6.8.0-1065.66
linux-image-ibm-classic 6.8.0-1065.66
linux-image-ibm-lts-24.04 6.8.0-1065.66
linux-image-intel-iot-realtime 6.8.1-1060.61
Available with Ubuntu Pro
linux-image-intel-iotg 6.8.0-142.142
linux-image-kvm 6.8.0-142.142
linux-image-laptop-23.10 6.8.0-142.142
linux-image-lowlatency 6.8.0-142.142.1
linux-image-lowlatency-6.8 6.8.0-142.142.1
linux-image-lowlatency-64k 6.8.0-142.142.1
linux-image-lowlatency-64k-6.8 6.8.0-142.142.1
linux-image-oracle-6.8 6.8.0-1062.65
linux-image-oracle-64k-6.8 6.8.0-1062.65
linux-image-oracle-64k-lts-24.04 6.8.0-1062.65
linux-image-oracle-lts-24.04 6.8.0-1062.65
linux-image-raspi 6.8.0-1065.69
linux-image-raspi-6.8 6.8.0-1065.69
linux-image-raspi-realtime 6.8.0-2054.56
Available with Ubuntu Pro
linux-image-raspi-realtime-6.8 6.8.0-2054.56
Available with Ubuntu Pro
linux-image-realtime 6.8.1-1060.61
Available with Ubuntu Pro
linux-image-realtime-6.8.1 6.8.1-1060.61
Available with Ubuntu Pro
linux-image-virtual 6.8.0-142.142
linux-image-virtual-6.8 6.8.0-142.142
Ubuntu 22.04 LTS
linux-image-6.8.0-1062-oracle 6.8.0-1062.65~22.04.1
linux-image-6.8.0-1062-oracle-64k 6.8.0-1062.65~22.04.1
linux-image-6.8.0-1066-azure-fde 6.8.0-1066.73~22.04.1
linux-image-6.8.0-1068-azure 6.8.0-1068.76~22.04.1
linux-image-6.8.0-1069-gcp 6.8.0-1069.77~22.04.1
linux-image-6.8.0-1069-gcp-64k 6.8.0-1069.77~22.04.1
linux-image-6.8.0-142-lowlatency 6.8.0-142.142.1~22.04.1
linux-image-6.8.0-142-lowlatency-64k 6.8.0-142.142.1~22.04.1
linux-image-6.8.1-1060-realtime 6.8.1-1060.61~22.04.1
Available with Ubuntu Pro
linux-image-azure 6.8.0-1068.76~22.04.1
linux-image-azure-6.8 6.8.0-1068.76~22.04.1
linux-image-azure-fde 6.8.0-1066.73~22.04.1
linux-image-azure-fde-6.8 6.8.0-1066.73~22.04.1
linux-image-gcp 6.8.0-1069.77~22.04.1
linux-image-gcp-6.8 6.8.0-1069.77~22.04.1
linux-image-gcp-64k 6.8.0-1069.77~22.04.1
linux-image-gcp-64k-6.8 6.8.0-1069.77~22.04.1
linux-image-lowlatency-6.8 6.8.0-142.142.1~22.04.1
linux-image-lowlatency-64k-6.8 6.8.0-142.142.1~22.04.1
linux-image-lowlatency-64k-hwe-22.04 6.8.0-142.142.1~22.04.1
linux-image-lowlatency-hwe-22.04 6.8.0-142.142.1~22.04.1
linux-image-oracle 6.8.0-1062.65~22.04.1
linux-image-oracle-6.8 6.8.0-1062.65~22.04.1
linux-image-oracle-64k 6.8.0-1062.65~22.04.1
linux-image-oracle-64k-6.8 6.8.0-1062.65~22.04.1
linux-image-realtime-6.8.1 6.8.1-1060.61~22.04.1
Available with Ubuntu Pro
linux-image-realtime-hwe-22.04 6.8.1-1060.61~22.04.1
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-8817-1
CVE-2025-10263, CVE-2026-53131, CVE-2026-53186, CVE-2026-53216,
CVE-2026-53221, CVE-2026-53354, CVE-2026-53355, CVE-2026-63886,
CVE-2026-63887, CVE-2026-63888, CVE-2026-63912, CVE-2026-63922,
CVE-2026-63924, CVE-2026-63984, CVE-2026-63992, CVE-2026-63993,
CVE-2026-63994, CVE-2026-64000, CVE-2026-64007, CVE-2026-64091
Package Information:
https://launchpad.net/ubuntu/+source/linux/6.8.0-142.142
https://launchpad.net/ubuntu/+source/linux-azure/6.8.0-1068.76
https://launchpad.net/ubuntu/+source/linux-azure-fde/6.8.0-1066.73
https://launchpad.net/ubuntu/+source/linux-azure-fips/6.8.0-1068.76+fips1
https://launchpad.net/ubuntu/+source/linux-fips/6.8.0-142.142+fips1
https://launchpad.net/ubuntu/+source/linux-gcp/6.8.0-1069.77
https://launchpad.net/ubuntu/+source/linux-gcp-fips/6.8.0-1068.76+fips1
https://launchpad.net/ubuntu/+source/linux-gke/6.8.0-1064.72
https://launchpad.net/ubuntu/+source/linux-gkeop/6.8.0-1050.54
https://launchpad.net/ubuntu/+source/linux-ibm/6.8.0-1065.66
https://launchpad.net/ubuntu/+source/linux-lowlatency/6.8.0-142.142.1
https://launchpad.net/ubuntu/+source/linux-oracle/6.8.0-1062.65
https://launchpad.net/ubuntu/+source/linux-raspi/6.8.0-1065.69
https://launchpad.net/ubuntu/+source/linux-raspi-realtime/6.8.0-2054.56
https://launchpad.net/ubuntu/+source/linux-realtime/6.8.1-1060.61
https://launchpad.net/ubuntu/+source/linux-azure-6.8/6.8.0-1068.76~22.04.1
https://launchpad.net/ubuntu/+source/linux-azure-fde-6.8/6.8.0-1066.73~22.04.1
https://launchpad.net/ubuntu/+source/linux-gcp-6.8/6.8.0-1069.77~22.04.1
https://launchpad.net/ubuntu/+source/linux-lowlatency-hwe-6.8/6.8.0-142.142.1~22.04.1
https://launchpad.net/ubuntu/+source/linux-oracle-6.8/6.8.0-1062.65~22.04.1
https://launchpad.net/ubuntu/+source/linux-realtime-6.8/6.8.1-1060.61~22.04.1
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