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
3 - 12 of 9733 results
12 August 2025
A security issue was fixed in the Linux kernel.
- Ubuntu 24.04 LTS
CVE ID
11 August 2025
Several security issues were fixed in OpenJDK 17.
- Ubuntu 25.04 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS
CVE ID
CVE-2025-50059, CVE-2025-30754, CVE-2025-50106 + 1 other
11 August 2025
Dnsmasq could be made to crash if it received specially crafted network traffic.
- Ubuntu 14.04 LTS
CVE ID
7 August 2025
Several security issues were fixed in cifs-utils.
- Ubuntu 16.04 LTS,
- 14.04 LTS
CVE ID
CVE-2021-20208, CVE-2022-27239, CVE-2020-14342 + 1 other
6 August 2025
Several security issues were fixed in poppler.
- Ubuntu 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
5 August 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 22.04 LTS
CVE ID
CVE-2025-23147, CVE-2024-46742, CVE-2025-37817 + 148 others
5 August 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 18.04 LTS
CVE ID
CVE-2023-52975, CVE-2023-52885, CVE-2025-37797 + 7 others
5 August 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 18.04 LTS
CVE ID
CVE-2024-56748, CVE-2024-53239, CVE-2023-52757 + 7 others
5 August 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 14.04 LTS
CVE ID
CVE-2024-56748, CVE-2024-53239, CVE-2023-52757 + 7 others
5 August 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 18.04 LTS,
- 16.04 LTS
CVE ID
CVE-2023-52975, CVE-2023-52885, CVE-2025-37797 + 7 others
Resources
Join the discussion
Canonical is offering
Expanded Security Maintenance
Canonical is offering Ubuntu Expanded Security Maintenance (ESM) for security fixes and essential packages.