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
2 - 11 of 48 results
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
3 December 2025
Several security issues were fixed in PostgreSQL.
- Ubuntu 25.10 ,
- 25.04 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
3 December 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 25.10
CVE ID
CVE-2025-40025, CVE-2025-40109, CVE-2025-40027 + 3 others
3 December 2025
KDE Connect could allow authentication of impersonated devices.
- Ubuntu 25.10
CVE ID
2 December 2025
Several security issues were fixed in Django.
- 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
2 December 2025
USN-7855-1 introduced a regression in Unbound
- Ubuntu 25.10 ,
- 25.04 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
1 December 2025
Several security issues were fixed in CRaC JDK 25.
- Ubuntu 25.10
CVE ID
1 December 2025
Several security issues were fixed in CRaC JDK 21.
- Ubuntu 25.10 ,
- 25.04
CVE ID
1 December 2025
Several security issues were fixed in CRaC JDK 17.
- Ubuntu 25.10 ,
- 25.04
CVE ID
1 December 2025
Several security issues were fixed in GNU binutils.
- 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
CVE-2025-3198, CVE-2025-5244, CVE-2025-8225 + 8 others
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