1. Ubuntu Security Notices
  2. USN-8361-3

USN-8361-3: Linux kernel vulnerability

Publication date

17 June 2026

Overview

The system could be compromised under certain conditions.

Releases

Packages

  • linux - Linux kernel
  • linux-aws - Linux kernel for Amazon Web Services (AWS) systems
  • linux-kvm - Linux kernel for cloud environments

Details

A security issue was discovered in the Linux kernel.
An attacker could possibly use this to compromise the system.
This update corrects flaws in the following subsystem:

  • Packet sockets

A security issue was discovered in the Linux kernel.
An attacker could possibly use this to compromise the system.
This update corrects flaws in the following subsystem:

  • Packet sockets

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
16.04 LTS xenial linux-image-4.4.0-1156-kvm –  4.4.0-1156.167  
linux-image-4.4.0-1193-aws –  4.4.0-1193.208  
linux-image-4.4.0-281-generic –  4.4.0-281.315  
linux-image-4.4.0-281-lowlatency –  4.4.0-281.315  
linux-image-aws –  4.4.0.1193.197  
linux-image-generic –  4.4.0.281.287  
linux-image-generic-lts-xenial –  4.4.0.281.287  
linux-image-kvm –  4.4.0.1156.153  
linux-image-lowlatency –  4.4.0.281.287  
linux-image-lowlatency-lts-xenial –  4.4.0.281.287  
linux-image-virtual –  4.4.0.281.287  
linux-image-virtual-lts-xenial –  4.4.0.281.287  

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References

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