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
141 - 150 of 2886 results
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
18 August 2025
Several security issues were fixed in the kernel.
- Ubuntu 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS,
- 14.04 LTS
CVE ID
CVE-2022-49176, CVE-2023-52885, CVE-2022-49179 + 5 others
14 August 2025
Several security issues were fixed in AIDE.
- Ubuntu 25.04 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS,
- 14.04 LTS
CVE ID
14 August 2025
Several security issues were fixed in libssh.
- Ubuntu 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
14 August 2025
Several security issues were fixed in libxml2.
- Ubuntu 25.04 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS,
- 14.04 LTS
CVE ID
CVE-2025-6021, CVE-2025-6170, CVE-2025-49796 + 1 other
13 August 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 16.04 LTS
CVE ID
CVE-2024-38541, CVE-2025-37797, CVE-2023-52757 + 7 others
7 August 2025
Several security issues were fixed in cifs-utils.
- Ubuntu 16.04 LTS,
- 14.04 LTS
CVE ID
CVE-2021-20208, CVE-2022-27239, CVE-2020-14342 + 1 other
6 August 2025
Several security issues were fixed in poppler.
- Ubuntu 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
5 August 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 18.04 LTS,
- 16.04 LTS
CVE ID
CVE-2023-52975, CVE-2023-52885, CVE-2025-37797 + 7 others
4 August 2025
USN-7545-1 introduced a regression in Apport
- Ubuntu 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
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