Alerts This Week
Warning Icon 1 1,146
Alerts This Week
Warning Icon 1 1,146

Significant AppArmor Vulnerability in Ubuntu 20 04 LTS linux-aws-fips

ubuntu
Calendar Grey March 24, 2026
Dist Ubuntu Esm H88
Update Ubuntu 20.04 LTS for linux-aws-fips to address local privilege escalation and denial of service issues.
The system could be made to run programs as an administrator.

Summary

The system could be made to run programs as an administrator.

Software Description:

- linux-aws-fips: Linux kernel for Amazon Web Services (AWS) systems with FIPS

Details:

Qualys discovered that several vulnerabilities existed in the AppArmor

Linux kernel Security Module (LSM). An unprivileged local attacker could

use these issues to load, replace, and remove arbitrary AppArmor profiles

causing denial of service, exposure of sensitive information (kernel

memory), local privilege escalation, or possibly escape a container.

(LP: #2143853)

Topics%20covered

Topics Covered

security advisory denial of service local privilege escalation Ubuntu important AppArmor

Update Instructions

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

Ubuntu 20.04 LTS
   linux-image-5.4.0-1156-aws-fips  5.4.0-1156.166+fips1
                                   Available with Ubuntu Pro
   linux-image-aws-fips            5.4.0.1156.103
                                   Available with Ubuntu Pro
   linux-image-aws-fips-5.4        5.4.0.1156.103
                                   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-8121-1

https://launchpad.net/bugs/2143853

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8121-1

Topics%20covered

Topics Covered

security advisory denial of service local privilege escalation Ubuntu important AppArmor

Package Information

Get the latest News and Insights

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

Your message here