[USN-8015-4] Linux kernel vulnerabilities

[Rodrigo Figueiredo Zaiden]

==========================================================================
Ubuntu Security Notice USN-8015-4
February 11, 2026

linux-aws, linux-aws-6.8, linux-gcp, linux-gcp-6.8, linux-ibm,
linux-ibm-6.8, linux-lowlatency-hwe-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-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-ibm: Linux kernel for IBM cloud systems
- linux-aws-6.8: Linux kernel for Amazon Web Services (AWS) systems
- linux-gcp-6.8: Linux kernel for Google Cloud Platform (GCP) 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:
   - Cryptographic API;
   - SMB network file system;
   - io_uring subsystem;
(CVE-2025-38561, CVE-2025-39698, CVE-2025-40019)

Update instructions:

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

Ubuntu 24.04 LTS
   linux-image-6.8.0-1043-ibm      6.8.0-1043.43
   linux-image-6.8.0-1045-aws      6.8.0-1045.47
   linux-image-6.8.0-1045-aws-64k  6.8.0-1045.47
   linux-image-6.8.0-1046-gcp      6.8.0-1046.49
   linux-image-6.8.0-1046-gcp-64k  6.8.0-1046.49
   linux-image-aws-6.8             6.8.0-1045.47
   linux-image-aws-64k-6.8         6.8.0-1045.47
   linux-image-aws-64k-lts-24.04   6.8.0-1045.47
   linux-image-aws-lts-24.04       6.8.0-1045.47
   linux-image-gcp-6.8             6.8.0-1046.49
   linux-image-gcp-64k-6.8         6.8.0-1046.49
   linux-image-gcp-64k-lts-24.04   6.8.0-1046.49
   linux-image-gcp-lts-24.04       6.8.0-1046.49
   linux-image-ibm                 6.8.0-1043.43
   linux-image-ibm-6.8             6.8.0-1043.43
   linux-image-ibm-classic         6.8.0-1043.43
   linux-image-ibm-lts-24.04       6.8.0-1043.43

Ubuntu 22.04 LTS
   linux-image-6.8.0-1043-ibm      6.8.0-1043.43~22.04.1
   linux-image-6.8.0-1045-aws      6.8.0-1045.47~22.04.1
   linux-image-6.8.0-1045-aws-64k  6.8.0-1045.47~22.04.1
   linux-image-6.8.0-1046-gcp      6.8.0-1046.49~22.04.1
   linux-image-6.8.0-1046-gcp-64k  6.8.0-1046.49~22.04.1
   linux-image-6.8.0-94-lowlatency  6.8.0-94.96.1~22.04.1
   linux-image-6.8.0-94-lowlatency-64k  6.8.0-94.96.1~22.04.1
   linux-image-aws                 6.8.0-1045.47~22.04.1
   linux-image-aws-6.8             6.8.0-1045.47~22.04.1
   linux-image-aws-64k             6.8.0-1045.47~22.04.1
   linux-image-aws-64k-6.8         6.8.0-1045.47~22.04.1
   linux-image-gcp                 6.8.0-1046.49~22.04.1
   linux-image-gcp-6.8             6.8.0-1046.49~22.04.1
   linux-image-gcp-64k             6.8.0-1046.49~22.04.1
   linux-image-gcp-64k-6.8         6.8.0-1046.49~22.04.1
   linux-image-ibm-6.8             6.8.0-1043.43~22.04.1
   linux-image-lowlatency-6.8      6.8.0-94.96.1~22.04.1
   linux-image-lowlatency-64k-6.8  6.8.0-94.96.1~22.04.1
   linux-image-lowlatency-64k-hwe-22.04  6.8.0-94.96.1~22.04.1
   linux-image-lowlatency-hwe-22.04  6.8.0-94.96.1~22.04.1

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-8015-4
   https://ubuntu.com/security/notices/USN-8015-3
   https://ubuntu.com/security/notices/USN-8015-2
   https://ubuntu.com/security/notices/USN-8015-1
   CVE-2025-38561, CVE-2025-39698, CVE-2025-40019

Package Information:
   https://launchpad.net/ubuntu/+source/linux-aws/6.8.0-1045.47
   https://launchpad.net/ubuntu/+source/linux-gcp/6.8.0-1046.49
   https://launchpad.net/ubuntu/+source/linux-ibm/6.8.0-1043.43
   https://launchpad.net/ubuntu/+source/linux-aws-6.8/6.8.0-1045.47~22.04.1
   https://launchpad.net/ubuntu/+source/linux-gcp-6.8/6.8.0-1046.49~22.04.1
   https://launchpad.net/ubuntu/+source/linux-ibm-6.8/6.8.0-1043.43~22.04.1
  
https://launchpad.net/ubuntu/+source/linux-lowlatency-hwe-6.8/6.8.0-94.96.1~22.04.1

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