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 2629 results
2 October 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 18.04 LTS
CVE ID
CVE-2025-38617, CVE-2025-38477, CVE-2025-38618 + 4 others
2 October 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 18.04 LTS,
- 16.04 LTS
CVE ID
CVE-2025-38618, CVE-2025-38477, CVE-2024-49924 + 4 others
2 October 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 20.04 LTS,
- 18.04 LTS
CVE ID
CVE-2025-38618, CVE-2025-38477, CVE-2025-37785 + 2 others
1 October 2025
Several security issues were fixed in Django.
- Ubuntu 25.04 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS,
- 14.04 LTS
CVE ID
30 September 2025
Several security issues were fixed in Libxslt.
- Ubuntu 18.04 LTS,
- 16.04 LTS,
- 14.04 LTS
CVE ID
30 September 2025
Several security issues were fixed in OpenSSL.
- Ubuntu 25.04 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS,
- 14.04 LTS
CVE ID
29 September 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
29 September 2025
USN-7015-4 introduced a regression in Python 2.7
- Ubuntu 18.04 LTS,
- 16.04 LTS
CVE ID
28 September 2025
Several security issues were fixed in Inetutils.
- Ubuntu 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS,
- 14.04 LTS
CVE ID
CVE-2022-39028, CVE-2020-10188, CVE-2019-0053 + 1 other
28 September 2025
Several security issues were fixed in Qt.
- Ubuntu 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
CVE-2023-24607, CVE-2023-33285, CVE-2023-32762 + 1 other
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