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 9941 results
16 October 2025
Several security issues were fixed in .NET
- Ubuntu 25.10 ,
- 25.04 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
16 October 2025
Apache Subversion could be made to crash if it opened a specially crafted file.
- Ubuntu 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS
CVE ID
16 October 2025
Several security issues were fixed in Samba.
- Ubuntu 25.10 ,
- 25.04 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
16 October 2025
Redis could be made to crash or run programs if it received specially crafted network traffic from an authenticated user.
- Ubuntu 22.04 LTS
CVE ID
16 October 2025
Redict could be made to crash or run programs if it received specially crafted network traffic from an authenticated user.
- Ubuntu 25.10 ,
- 25.04
CVE ID
16 October 2025
Several security issues were fixed in MuPDF.
- Ubuntu 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
CVE-2018-16647, CVE-2018-10289, CVE-2018-1000036 + 5 others
15 October 2025
Redis could be made to crash or run programs if it received specially crafted network traffic from an authenticated user.
- Ubuntu 25.10 ,
- 25.04 ,
- 24.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS,
- 14.04 LTS
CVE ID
15 October 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 22.04 LTS
CVE ID
CVE-2025-21991, CVE-2025-21964, CVE-2025-21914 + 104 others
15 October 2025
Several security issues were fixed in FFmpeg.
- Ubuntu 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
CVE-2024-35368, CVE-2024-36619, CVE-2024-35366 + 6 others
14 October 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 22.04 LTS
CVE ID
CVE-2025-38617, CVE-2025-38683, CVE-2025-38477 + 1 other
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