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Ubuntu 16.04 LTS Security Advisory USN-8070-1 Linux Kernel Important Fix

ubuntu
Calendar Grey March 4, 2026
Dist Ubuntu Esm H88
Several security issues addressed in the Linux kernel for Ubuntu 16.04 LTS, emphasizing critical fixes and updates.
Several security issues were fixed in the Linux kernel.

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-kvm: Linux kernel for cloud environments

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;

(CVE-2021-47599, CVE-2022-48875, CVE-2022-49267, CVE-2024-47659,

CVE-2024-49927, CVE-2024-56548, CVE-2024-56593, CVE-2025-21704,

CVE-2025-40215)

Topics%20covered

Topics Covered

security advisory Ubuntu important system compromise Linux kernel network drivers

Update Instructions

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

Ubuntu 16.04 LTS
  linux-image-4.4.0-1153-kvm      4.4.0-1153.164
                                  Available with Ubuntu Pro
  linux-image-4.4.0-1190-aws      4.4.0-1190.205
                                  Available with Ubuntu Pro
  linux-image-4.4.0-278-generic   4.4.0-278.312
                                  Available with Ubuntu Pro
  linux-image-4.4.0-278-lowlatency  4.4.0-278.312
                                  Available with Ubuntu Pro
  linux-image-aws                 4.4.0.1190.194
                                  Available with Ubuntu Pro
  linux-image-generic             4.4.0.278.284
                                  Available with Ubuntu Pro
  linux-image-generic-lts-xenial  4.4.0.278.284
                                  Available with Ubuntu Pro
  linux-image-kvm                 4.4.0.1153.150
                                  Available with Ubuntu Pro
  linux-image-lowlatency          4.4.0.278.284
                                  Available with Ubuntu Pro
  linux-image-lowlatency-lts-xenial  4.4.0.278.284
                                  Available with Ubuntu Pro
  linux-image-virtual             4.4.0.278.284
                                  Available with Ubuntu Pro
  linux-image-virtual-lts-xenial  4.4.0.278.284
                                  Available with Ubuntu Pro

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-8070-1

CVE-2021-47599, CVE-2022-48875, CVE-2022-49267, CVE-2024-47659,

CVE-2024-49927, CVE-2024-56548, CVE-2024-56593, CVE-2025-21704,

CVE-2025-40215

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8070-1

Topics%20covered

Topics Covered

security advisory Ubuntu important system compromise Linux kernel network drivers

Package Information

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