Ubuntu has published a security, highlighting vulnerabilities in multiple products listed below on the 28th of September 2021. It is recommended that you take the necessary precautions by ensuring your products are always updated.
Ubuntu 21.04
Ubuntu 20.04 LTS
Ubuntu 18.04 LTS
For more information on these updates, you can follow these URLs:
https://ubuntu.com/security/notices?release=hirsute
https://ubuntu.com/security/notices?release=focal
https://ubuntu.com/security/notices?release=bionic
The Guyana National CIRT recommends that users and administrators review these updates and apply them where necessary.
PDF Download: Ubuntu Security Advisory.pdf
References
Ubuntu security advisory (29th September 2021). Retrieve from Canadian Centre for Cyber Security.
https://www.cyber.gc.ca/en/alerts/ubuntu-security-advisory-24
Ubuntu security advisory (28th September 2021). Retrieve from Ubuntu.
https://ubuntu.com/security/notices