==========================================================================
Ubuntu Security Notice USN-7835-1
October 22, 2025

linux, linux-aws, linux-azure, linux-azure-6.8, linux-gcp, linux-gkeop,
linux-ibm, linux-ibm-6.8, linux-lowlatency, linux-lowlatency-hwe-6.8,
linux-oracle 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-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) 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-azure-6.8: Linux kernel for Microsoft Azure cloud systems
- linux-ibm-6.8: Linux kernel for IBM cloud systems
- linux-lowlatency-hwe-6.8: Linux low latency kernel

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;
   - PowerPC architecture;
   - x86 architecture;
   - ACPI drivers;
   - Ublk userspace block driver;
   - Clock framework and drivers;
   - GPU drivers;
   - IIO subsystem;
   - InfiniBand drivers;
   - Media drivers;
   - MemoryStick subsystem;
   - Network drivers;
   - NTB driver;
   - PCI subsystem;
   - Remote Processor subsystem;
   - Thermal drivers;
   - Virtio Host (VHOST) subsystem;
   - 9P distributed file system;
   - File systems infrastructure;
   - JFS file system;
   - Network file system (NFS) server daemon;
   - NTFS3 file system;
   - SMB network file system;
   - Memory management;
   - RDMA verbs API;
   - Kernel fork() syscall;
   - Tracing infrastructure;
   - Watch queue notification mechanism;
   - Asynchronous Transfer Mode (ATM) subsystem;
   - Networking core;
   - IPv4 networking;
   - IPv6 networking;
   - Netfilter;
   - Network traffic control;
   - SCTP protocol;
   - TLS protocol;
   - SoC Audio for Freescale CPUs drivers;
(CVE-2025-39728, CVE-2025-23136, CVE-2025-22062, CVE-2025-22035,
CVE-2025-22020, CVE-2025-22083, CVE-2025-22071, CVE-2025-22060,
CVE-2025-22073, CVE-2025-22044, CVE-2025-22063, CVE-2025-22079,
CVE-2025-22057, CVE-2025-22095, CVE-2025-39735, CVE-2025-39682,
CVE-2025-22058, CVE-2025-22021, CVE-2025-22018, CVE-2025-22056,
CVE-2025-22054, CVE-2025-22080, CVE-2025-22039, CVE-2025-22019,
CVE-2025-22038, CVE-2025-22028, CVE-2023-53034, CVE-2024-58092,
CVE-2025-38637, CVE-2025-22089, CVE-2025-40114, CVE-2025-22068,
CVE-2025-37937, CVE-2025-22070, CVE-2025-22072, CVE-2025-22086,
CVE-2025-22050, CVE-2025-22040, CVE-2025-22065, CVE-2025-38575,
CVE-2025-22064, CVE-2025-22033, CVE-2025-22041, CVE-2025-22090,
CVE-2025-22036, CVE-2025-23138, CVE-2025-22047, CVE-2025-38240,
CVE-2025-22066, CVE-2025-22042, CVE-2025-38152, CVE-2025-22055,
CVE-2025-22081, CVE-2025-22045, CVE-2025-22053, CVE-2025-22075,
CVE-2025-22027, CVE-2025-22025, CVE-2025-22097)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 24.04 LTS
   linux-image-6.8.0-1025-gkeop    6.8.0-1025.28
   linux-image-6.8.0-1038-oracle   6.8.0-1038.39
   linux-image-6.8.0-1038-oracle-64k  6.8.0-1038.39
   linux-image-6.8.0-1039-ibm      6.8.0-1039.39
   linux-image-6.8.0-1041-aws      6.8.0-1041.43
   linux-image-6.8.0-1041-aws-64k  6.8.0-1041.43
   linux-image-6.8.0-1041-azure    6.8.0-1041.47+1
   linux-image-6.8.0-1042-gcp      6.8.0-1042.45
   linux-image-6.8.0-1042-gcp-64k  6.8.0-1042.45
   linux-image-6.8.0-86-generic    6.8.0-86.87
   linux-image-6.8.0-86-generic-64k  6.8.0-86.87
   linux-image-6.8.0-86-lowlatency  6.8.0-86.87.1
   linux-image-6.8.0-86-lowlatency-64k  6.8.0-86.87.1
   linux-image-aws-6.8             6.8.0-1041.43
   linux-image-aws-64k-6.8         6.8.0-1041.43
   linux-image-aws-64k-lts-24.04   6.8.0-1041.43
   linux-image-aws-lts-24.04       6.8.0-1041.43
   linux-image-azure-6.8           6.8.0-1041.47+1
   linux-image-azure-lts-24.04     6.8.0-1041.47+1
   linux-image-gcp-6.8             6.8.0-1042.45
   linux-image-gcp-64k-6.8         6.8.0-1042.45
   linux-image-gcp-64k-lts-24.04   6.8.0-1042.45
   linux-image-gcp-lts-24.04       6.8.0-1042.45
   linux-image-generic             6.8.0-86.87
   linux-image-generic-6.8         6.8.0-86.87
   linux-image-generic-64k         6.8.0-86.87
   linux-image-generic-64k-6.8     6.8.0-86.87
   linux-image-generic-lpae        6.8.0-86.87
   linux-image-gkeop               6.8.0-1025.28
   linux-image-gkeop-6.8           6.8.0-1025.28
   linux-image-ibm                 6.8.0-1039.39
   linux-image-ibm-6.8             6.8.0-1039.39
   linux-image-ibm-classic         6.8.0-1039.39
   linux-image-ibm-lts-24.04       6.8.0-1039.39
   linux-image-kvm                 6.8.0-86.87
   linux-image-lowlatency          6.8.0-86.87.1
   linux-image-lowlatency-6.8      6.8.0-86.87.1
   linux-image-lowlatency-64k      6.8.0-86.87.1
   linux-image-lowlatency-64k-6.8  6.8.0-86.87.1
   linux-image-oracle-6.8          6.8.0-1038.39
   linux-image-oracle-64k-6.8      6.8.0-1038.39
   linux-image-oracle-64k-lts-24.04  6.8.0-1038.39
   linux-image-oracle-lts-24.04    6.8.0-1038.39
   linux-image-virtual             6.8.0-86.87
   linux-image-virtual-6.8         6.8.0-86.87

Ubuntu 22.04 LTS
   linux-image-6.8.0-1039-ibm      6.8.0-1039.39~22.04.1
   linux-image-6.8.0-1041-azure    6.8.0-1041.47~22.04.1
   linux-image-6.8.0-86-lowlatency  6.8.0-86.87.1~22.04.1
   linux-image-6.8.0-86-lowlatency-64k  6.8.0-86.87.1~22.04.1
   linux-image-azure               6.8.0-1041.47~22.04.1
   linux-image-azure-6.8           6.8.0-1041.47~22.04.1
   linux-image-ibm-6.8             6.8.0-1039.39~22.04.1
   linux-image-lowlatency-6.8      6.8.0-86.87.1~22.04.1
   linux-image-lowlatency-64k-6.8  6.8.0-86.87.1~22.04.1
   linux-image-lowlatency-64k-hwe-22.04  6.8.0-86.87.1~22.04.1
   linux-image-lowlatency-hwe-22.04  6.8.0-86.87.1~22.04.1

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-7835-1
   CVE-2023-53034, CVE-2024-58092, CVE-2025-22018, CVE-2025-22019,
   CVE-2025-22020, CVE-2025-22021, CVE-2025-22025, CVE-2025-22027,
   CVE-2025-22028, CVE-2025-22033, CVE-2025-22035, CVE-2025-22036,
   CVE-2025-22038, CVE-2025-22039, CVE-2025-22040, CVE-2025-22041,
   CVE-2025-22042, CVE-2025-22044, CVE-2025-22045, CVE-2025-22047,
   CVE-2025-22050, CVE-2025-22053, CVE-2025-22054, CVE-2025-22055,
   CVE-2025-22056, CVE-2025-22057, CVE-2025-22058, CVE-2025-22060,
   CVE-2025-22062, CVE-2025-22063, CVE-2025-22064, CVE-2025-22065,
   CVE-2025-22066, CVE-2025-22068, CVE-2025-22070, CVE-2025-22071,
   CVE-2025-22072, CVE-2025-22073, CVE-2025-22075, CVE-2025-22079,
   CVE-2025-22080, CVE-2025-22081, CVE-2025-22083, CVE-2025-22086,
   CVE-2025-22089, CVE-2025-22090, CVE-2025-22095, CVE-2025-22097,
   CVE-2025-23136, CVE-2025-23138, CVE-2025-37937, CVE-2025-38152,
   CVE-2025-38240, CVE-2025-38575, CVE-2025-38637, CVE-2025-39682,
   CVE-2025-39728, CVE-2025-39735, CVE-2025-40114

Package Information:
   https://launchpad.net/ubuntu/+source/linux/6.8.0-86.87
   https://launchpad.net/ubuntu/+source/linux-aws/6.8.0-1041.43
   https://launchpad.net/ubuntu/+source/linux-azure/6.8.0-1041.47
   https://launchpad.net/ubuntu/+source/linux-gcp/6.8.0-1042.45
   https://launchpad.net/ubuntu/+source/linux-gkeop/6.8.0-1025.28
   https://launchpad.net/ubuntu/+source/linux-ibm/6.8.0-1039.39
   https://launchpad.net/ubuntu/+source/linux-lowlatency/6.8.0-86.87.1
   https://launchpad.net/ubuntu/+source/linux-oracle/6.8.0-1038.39
   https://launchpad.net/ubuntu/+source/linux-azure-6.8/6.8.0-1041.47~22.04.1
   https://launchpad.net/ubuntu/+source/linux-ibm-6.8/6.8.0-1039.39~22.04.1
  
https://launchpad.net/ubuntu/+source/linux-lowlatency-hwe-6.8/6.8.0-86.87.1~22.04.1