1. Ubuntu Security Notices
  2. USN-7627-1

USN-7627-1: Linux kernel vulnerabilities

Publication date

8 July 2025

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

  • linux - Linux kernel
  • linux-aws - Linux kernel for Amazon Web Services (AWS) systems
  • linux-aws-hwe - Linux kernel for Amazon Web Services (AWS-HWE) systems
  • linux-azure - Linux kernel for Microsoft Azure Cloud systems
  • linux-azure-4.15 - Linux kernel for Microsoft Azure Cloud systems
  • linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
  • linux-gcp-4.15 - Linux kernel for Google Cloud Platform (GCP) systems
  • linux-hwe - Linux hardware enablement (HWE) kernel
  • linux-kvm - Linux kernel for cloud environments
  • linux-oracle - 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:

  • PowerPC architecture;
  • Block layer subsystem;
  • ACPI drivers;
  • NILFS2 file system;
  • File systems infrastructure;
  • Memory management;
  • Network traffic control;
  • USB sound devices

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:

  • PowerPC architecture;
  • Block layer subsystem;
  • ACPI drivers;
  • NILFS2 file system;
  • File systems infrastructure;
  • Memory management;
  • Network traffic control;
  • USB sound devices

Update instructions

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

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.

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

Ubuntu Release Package Version
18.04 bionic linux-image-4.15.0-1144-oracle –  4.15.0-1144.155  
linux-image-4.15.0-1165-kvm –  4.15.0-1165.170  
linux-image-4.15.0-1175-gcp –  4.15.0-1175.192  
linux-image-4.15.0-1182-aws –  4.15.0-1182.195  
linux-image-4.15.0-1190-azure –  4.15.0-1190.205  
linux-image-4.15.0-239-generic –  4.15.0-239.251  
linux-image-4.15.0-239-lowlatency –  4.15.0-239.251  
linux-image-aws-4.15 –  4.15.0.1182.180  
linux-image-aws-lts-18.04 –  4.15.0.1182.180  
linux-image-azure-4.15 –  4.15.0.1190.158  
linux-image-azure-lts-18.04 –  4.15.0.1190.158  
linux-image-gcp-4.15 –  4.15.0.1175.188  
linux-image-gcp-lts-18.04 –  4.15.0.1175.188  
linux-image-generic –  4.15.0.239.223  
linux-image-kvm –  4.15.0.1165.156  
linux-image-lowlatency –  4.15.0.239.223  
linux-image-oracle-4.15 –  4.15.0.1144.149  
linux-image-oracle-lts-18.04 –  4.15.0.1144.149  
linux-image-virtual –  4.15.0.239.223  
16.04 xenial linux-image-4.15.0-1144-oracle –  4.15.0-1144.155~16.04.1  
linux-image-4.15.0-1175-gcp –  4.15.0-1175.192~16.04.1  
linux-image-4.15.0-1182-aws –  4.15.0-1182.195~16.04.1  
linux-image-4.15.0-1190-azure –  4.15.0-1190.205~16.04.1  
linux-image-4.15.0-239-generic –  4.15.0-239.251~16.04.1  
linux-image-4.15.0-239-lowlatency –  4.15.0-239.251~16.04.1  
linux-image-aws-hwe –  4.15.0.1182.195~16.04.1  
linux-image-azure –  4.15.0.1190.205~16.04.1  
linux-image-gcp –  4.15.0.1175.192~16.04.1  
linux-image-generic-hwe-16.04 –  4.15.0.239.251~16.04.1  
linux-image-gke –  4.15.0.1175.192~16.04.1  
linux-image-lowlatency-hwe-16.04 –  4.15.0.239.251~16.04.1  
linux-image-oem –  4.15.0.239.251~16.04.1  
linux-image-oracle –  4.15.0.1144.155~16.04.1  
linux-image-virtual-hwe-16.04 –  4.15.0.239.251~16.04.1  
14.04 trusty linux-image-4.15.0-1190-azure –  4.15.0-1190.205~14.04.1  
linux-image-azure –  4.15.0.1190.205~14.04.1  

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References

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