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 10087 results
5 December 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 22.04 LTS
CVE ID
CVE-2025-38227, CVE-2025-38678, CVE-2025-21729 + 1 other
5 December 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 25.10
CVE ID
CVE-2025-40026, CVE-2025-40028, CVE-2025-40027 + 3 others
4 December 2025
CUPS could be made to stop responding if it received specially crafted network traffic.
- Ubuntu 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
4 December 2025
Several security issues were fixed in MAME.
- Ubuntu 25.10 ,
- 25.04 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS
CVE ID
4 December 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 20.04 LTS
CVE ID
CVE-2024-56664, CVE-2025-21727, CVE-2023-52854 + 5 others
4 December 2025
CUPS could be made to stop responding if it received specially crafted network traffic.
- Ubuntu 25.10 ,
- 25.04 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
4 December 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 18.04 LTS
CVE ID
CVE-2024-49935, CVE-2024-53112, CVE-2025-40018 + 19 others
4 December 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 18.04 LTS,
- 16.04 LTS
CVE ID
CVE-2024-49935, CVE-2024-53112, CVE-2025-40018 + 19 others
4 December 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 14.04 LTS
CVE ID
4 December 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 22.04 LTS
CVE ID
CVE-2024-53068, CVE-2025-38695, CVE-2025-38502 + 175 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.