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 - 10 of 10165 results
15 January 2026
Several security issues were fixed in Git.
- Ubuntu 18.04 LTS,
- 16.04 LTS
CVE ID
15 January 2026
SimGear could be made to run programs as an administrator if it opened a specially crafted file.
- Ubuntu 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
15 January 2026
USN-7916-1 introduced a regression in python-apt
- Ubuntu 20.04 LTS
CVE ID
14 January 2026
Several security issues were fixed in libpng.
- Ubuntu 25.10 ,
- 25.04 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
14 January 2026
cpp-httplib could allow unintended access to network services if it received specially crafted network traffic.
- Ubuntu 25.10 ,
- 25.04 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
14 January 2026
Erlang could allow unintended access to network services.
- Ubuntu 24.04 LTS
CVE ID
14 January 2026
Several security issues were fixed in Rack.
- Ubuntu 25.10 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
CVE-2025-61771, CVE-2025-59830, CVE-2025-61772 + 3 others
14 January 2026
klibc could be made to crash if it received specially crafted input.
- Ubuntu 25.10 ,
- 25.04 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS,
- 14.04 LTS
CVE ID
14 January 2026
Several security issues were fixed in AngularJS.
- Ubuntu 25.04 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
CVE-2024-8372, CVE-2022-25844, CVE-2024-21490 + 7 others
13 January 2026
USN-7927-1 introduced a regression in urllib3
- Ubuntu 25.10 ,
- 25.04 ,
- 24.04 LTS
CVE ID
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