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 2425 results
21 August 2025
Several security issues were fixed in PHP.
- Ubuntu 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
21 August 2025
Several security issues were fixed in Python.
- Ubuntu 25.04 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS,
- 14.04 LTS
CVE ID
21 August 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 20.04 LTS
CVE ID
CVE-2025-37797, CVE-2024-49950, CVE-2023-52975 + 4 others
20 August 2025
poppler could be made to denial of service if it received a specially crafted PDF file.
- Ubuntu 25.04 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
20 August 2025
Several security issues were fixed in LibTIFF.
- Ubuntu 25.04 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS,
- 14.04 LTS
CVE ID
CVE-2025-8176, CVE-2025-8177, CVE-2025-8851 + 1 other
20 August 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 20.04 LTS
CVE ID
CVE-2025-38083, CVE-2023-52975, CVE-2024-38541 + 4 others
20 August 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 22.04 LTS,
- 20.04 LTS
CVE ID
CVE-2025-38048, CVE-2025-38078, CVE-2025-38058 + 18 others
19 August 2025
GNU Compiler Collection's (GCC) could be made to ignore security checks.
- Ubuntu 22.04 LTS,
- 20.04 LTS
CVE ID
19 August 2025
Several security issues were fixed in Apache HTTP Server.
- Ubuntu 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
CVE-2024-43204, CVE-2025-23048, CVE-2025-49812 + 4 others
19 August 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 20.04 LTS,
- 18.04 LTS
CVE ID
CVE-2024-38541, CVE-2025-38083, CVE-2024-50073 + 4 others
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