1. Ubuntu Security Notices
  2. USN-8070-2

USN-8070-2: Linux kernel vulnerabilities

Publication date

4 March 2026

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

  • linux-aws - Linux kernel for Amazon Web Services (AWS) systems
  • linux-lts-xenial - Linux hardware enablement kernel from Xenial for Trusty

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:

  • x86 architecture;
  • MMC subsystem;
  • Network drivers;
  • USB Device Class drivers;
  • BTRFS file system;
  • File systems infrastructure;
  • XFRM subsystem;
  • IPv4 networking;
  • IPv6 networking;
  • MAC80211 subsystem;
  • Simplified Mandatory Access Control Kernel framework

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:

  • x86 architecture;
  • MMC subsystem;
  • Network drivers;
  • USB Device Class drivers;
  • BTRFS file system;
  • File systems infrastructure;
  • XFRM subsystem;
  • IPv4 networking;
  • IPv6 networking;
  • MAC80211 subsystem;
  • Simplified Mandatory Access Control Kernel framework

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
14.04 LTS trusty linux-image-4.4.0-1152-aws –  4.4.0-1152.158  
linux-image-4.4.0-278-generic –  4.4.0-278.312~14.04.1  
linux-image-4.4.0-278-lowlatency –  4.4.0-278.312~14.04.1  
linux-image-aws –  4.4.0.1152.149  
linux-image-generic-lts-xenial –  4.4.0.278.312~14.04.1  
linux-image-lowlatency-lts-xenial –  4.4.0.278.312~14.04.1  
linux-image-virtual-lts-xenial –  4.4.0.278.312~14.04.1  

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References

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