Alerts This Week
Warning Icon 1 606
Alerts This Week
Warning Icon 1 606

Ubuntu 18.04 Linux Kernel Important Escalation Threat USN-8281-1

ubuntu
Calendar Grey May 19, 2026
Dist Ubuntu Esm H88
Several security issues fixed in Ubuntu Linux kernel recommendation for update and reboot instructions.
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-aws-fips: Linux kernel for Amazon Web Services (AWS) systems with FIPS

- linux-fips: Linux kernel with FIPS

- linux-gcp-4.15: Linux kernel for Google Cloud Platform (GCP) systems

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

FIPS

- linux-kvm: Linux kernel for cloud environments

- linux-oracle: Linux kernel for Oracle Cloud systems

Details:

It was discovered that the Linux kernel algif_aead module did not properly

handle in-place cryptographic operations. This flaw is known as Copy Fail.

A local attacker could use this to escalate privileges, or possibly escape

a container. (CVE-2026-31431)

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:

- Cryptog...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory Ubuntu important Linux kernel escalation docker

Update Instructions

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

Ubuntu 18.04 LTS
   linux-image-4.15.0-1147-fips    4.15.0-1147.159
                                   Available with Ubuntu Pro
   linux-image-4.15.0-1154-oracle  4.15.0-1154.165
                                   Available with Ubuntu Pro
   linux-image-4.15.0-1174-kvm     4.15.0-1174.179
                                   Available with Ubuntu Pro
   linux-image-4.15.0-1185-gcp     4.15.0-1185.202
                                   Available with Ubuntu Pro
   linux-image-4.15.0-1192-aws     4.15.0-1192.205
                                   Available with Ubuntu Pro
   linux-image-4.15.0-2093-gcp-fips  4.15.0-2093.99
                                   Available with Ubuntu Pro
   linux-image-4.15.0-2130-aws-fips  4.15.0-2130.136
                                   Available with Ubuntu Pro
   linux-image-4.15.0-250-generic  4.15.0-250.262
                                   Available with Ubuntu Pro
   linux-image-4.15.0-250-lowlatency  4.15.0-250.262
                                   Available with Ubuntu Pro
   linux-image-aws-4.15            4.15.0.1192.190
                                   Available with Ubuntu Pro
   linux-image-aws-fips            4.15.0.2130.124
                                   Available with Ubuntu Pro
   linux-image-aws-fips-4.15       4.15.0.2130.124
                                   Available with Ubuntu Pro
   linux-image-aws-lts-18.04       4.15.0.1192.190
                                   Available with Ubuntu Pro
   linux-image-fips                4.15.0.1147.144
                                   Available with Ubuntu Pro
   linux-image-gcp-4.15            4.15.0.1185.198
                                   Available with Ubuntu Pro
   linux-image-gcp-fips            4.15.0.2093.91
                                   Available with Ubuntu Pro
   linux-image-gcp-fips-4.15       4.15.0.2093.91
                                   Available with Ubuntu Pro
   linux-image-gcp-lts-18.04       4.15.0.1185.198
                                   Available with Ubuntu Pro
   linux-image-generic             4.15.0.250.234
                                   Available with Ubuntu Pro
   linux-image-kvm                 4.15.0.1174.165
                                   Available with Ubuntu Pro
   linux-image-lowlatency          4.15.0.250.234
                                   Available with Ubuntu Pro
   linux-image-oracle-4.15         4.15.0.1154.159
                                   Available with Ubuntu Pro
   linux-image-oracle-lts-18.04    4.15.0.1154.159
                                   Available with Ubuntu Pro
   linux-image-virtual             4.15.0.250.234
                                   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-8281-1

CVE-2026-31431, CVE-2026-31504, CVE-2026-43033, CVE-2026-43077,

CVE-2026-43078

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8281-1

Topics%20covered

Topics Covered

security advisory Ubuntu important Linux kernel escalation docker

Package Information

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here