Ubuntu Security Notices
Developers issue an Ubuntu Security Notice when a security issue is fixed in an official Ubuntu package. You can find additional guidance for high-profile vulnerabilities in the Ubuntu Vulnerability Knowledge Base section.
To report a security vulnerability in an Ubuntu package, please contact the Security Team.
The Security Team also produces OVAL files for each Ubuntu release. These are an industry-standard machine-readable format dataset that contain details of all known security vulnerabilities and fixes relevant to the Ubuntu release, and can be used to determine whether a particular patch is appropriate. OVAL files can also be used to audit a system to check whether the latest security fixes have been applied.
Search USNs
USN ID, name, description or CVE ID contains
1 - 6 of 6 results
28 April 2026
Several security issues were fixed in UltraJSON.
- Ubuntu 26.04 LTS,
- 25.10 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
28 April 2026
Rack::Session could allow unintended access to network services.
- Ubuntu 26.04 LTS
CVE ID
28 April 2026
NLTK could be made to crash or run programs as your login if it opened a specially crafted zip file.
- Ubuntu 26.04 LTS,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS,
- 14.04 LTS
CVE ID
28 April 2026
Several security issues were fixed in .NET.
- Ubuntu 26.04 LTS
CVE ID
CVE-2026-33116, CVE-2026-32178, CVE-2026-26171 + 2 others
28 April 2026
Several security issues were fixed in jq.
- Ubuntu 26.04 LTS
CVE ID
CVE-2026-33948, CVE-2026-40164, CVE-2026-32316 + 3 others
27 April 2026
authd could be made to escalate privileges.
- Ubuntu 26.04 LTS
CVE ID
Resources
Join the discussion
Get up to 15 years of security
maintenance for your new or established systems
Get up to 15 years of security maintenance for your entire Ubuntu Archive. Keep your systems stable with security backporting and avoid forced upgrades.