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Ubuntu 18.04 LTS Kernel Security Critical Flaws USN-8112-1

ubuntu
Calendar Grey March 20, 2026
Dist Ubuntu Esm H88
Several security issues in Ubuntu's kernel require immediate updates to ensure system integrity and safety.
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-gcp-4.15: Linux kernel for Google Cloud Platform (GCP) systems

- linux-kvm: Linux kernel for cloud environments

- linux-oracle: Linux kernel for Oracle Cloud systems

- linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems

- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems

- linux-hwe: Linux hardware enablement (HWE) 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:

- x86 architecture;

- MMC subsystem;

- Network drivers;

- USB Device Class drivers;

- BTRFS file system;

- HFS+ file system;

- XFRM subsystem;

- IPv4 networking;

- IPv6 networking;

- MAC80211 subsystem;

- Simplified Mandatory Access Control Kernel framew...

Read the Full Advisory

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Topics Covered

security advisory security issue update critical Ubuntu kernel

Update Instructions

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

Ubuntu 18.04 LTS
  linux-image-4.15.0-1151-oracle  4.15.0-1151.162
                                  Available with Ubuntu Pro
  linux-image-4.15.0-1171-kvm     4.15.0-1171.176
                                  Available with Ubuntu Pro
  linux-image-4.15.0-1182-gcp     4.15.0-1182.199
                                  Available with Ubuntu Pro
  linux-image-4.15.0-1189-aws     4.15.0-1189.202
                                  Available with Ubuntu Pro
  linux-image-4.15.0-247-generic  4.15.0-247.259
                                  Available with Ubuntu Pro
  linux-image-4.15.0-247-lowlatency  4.15.0-247.259
                                  Available with Ubuntu Pro
  linux-image-aws-4.15            4.15.0.1189.187
                                  Available with Ubuntu Pro
  linux-image-aws-lts-18.04       4.15.0.1189.187
                                  Available with Ubuntu Pro
  linux-image-gcp-4.15            4.15.0.1182.195
                                  Available with Ubuntu Pro
  linux-image-gcp-lts-18.04       4.15.0.1182.195
                                  Available with Ubuntu Pro
  linux-image-generic             4.15.0.247.231
                                  Available with Ubuntu Pro
  linux-image-kvm                 4.15.0.1171.162
                                  Available with Ubuntu Pro
  linux-image-lowlatency          4.15.0.247.231
                                  Available with Ubuntu Pro
  linux-image-oracle-4.15         4.15.0.1151.156
                                  Available with Ubuntu Pro
  linux-image-oracle-lts-18.04    4.15.0.1151.156
                                  Available with Ubuntu Pro
  linux-image-virtual             4.15.0.247.231
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  linux-image-4.15.0-1151-oracle  4.15.0-1151.162~16.04.1
                                  Available with Ubuntu Pro
  linux-image-4.15.0-1182-gcp     4.15.0-1182.199~16.04.1
                                  Available with Ubuntu Pro
  linux-image-4.15.0-1189-aws     4.15.0-1189.202~16.04.1
                                  Available with Ubuntu Pro
  linux-image-4.15.0-247-generic  4.15.0-247.259~16.04.1
                                  Available with Ubuntu Pro
  linux-image-4.15.0-247-lowlatency  4.15.0-247.259~16.04.1
                                  Available with Ubuntu Pro
  linux-image-aws-hwe             4.15.0.1189.202~16.04.1
                                  Available with Ubuntu Pro
  linux-image-gcp                 4.15.0.1182.199~16.04.1
                                  Available with Ubuntu Pro
  linux-image-generic-hwe-16.04   4.15.0.247.259~16.04.1
                                  Available with Ubuntu Pro
  linux-image-gke                 4.15.0.1182.199~16.04.1
                                  Available with Ubuntu Pro
  linux-image-lowlatency-hwe-16.04  4.15.0.247.259~16.04.1
                                  Available with Ubuntu Pro
  linux-image-oem                 4.15.0.247.259~16.04.1
                                  Available with Ubuntu Pro
  linux-image-oracle              4.15.0.1151.162~16.04.1
                                  Available with Ubuntu Pro
  linux-image-virtual-hwe-16.04   4.15.0.247.259~16.04.1
                                  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-8112-1

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

CVE-2024-49927, CVE-2024-56548, CVE-2024-56581, CVE-2024-56593,

CVE-2025-21704, CVE-2025-40215

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8112-1

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Topics Covered

security advisory security issue update critical Ubuntu kernel

Package Information

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