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 2547 results
2 July 2025
Several security issues were fixed in logback.
- Ubuntu 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
30 June 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 18.04 LTS
CVE ID
CVE-2024-56551, CVE-2025-21993, CVE-2025-22045 + 29 others
30 June 2025
Sudo could be made to bypass host restrictions.
- Ubuntu 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS,
- 14.04 LTS
CVE ID
30 June 2025
USN-7582-1 introduced a regression in Samba.
- Ubuntu 18.04 LTS,
- 16.04 LTS,
- 14.04 LTS
30 June 2025
Several security issues were fixed in Composer.
- Ubuntu 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
CVE-2024-35241, CVE-2024-35242, CVE-2024-24821 + 2 others
26 June 2025
libxslt could be made to expose sensitive information.
- Ubuntu 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS,
- 14.04 LTS
CVE ID
25 June 2025
urllib3 could be made to expose sensitive information over the network.
- Ubuntu 25.04 ,
- 24.10 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
25 June 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 18.04 LTS
CVE ID
CVE-2024-56551, CVE-2025-21993, CVE-2025-22045 + 29 others
23 June 2025
Several security issues were fixed in Gnuplot.
- Ubuntu 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS,
- 14.04 LTS
CVE ID
CVE-2020-25969, CVE-2018-19492, CVE-2018-19490 + 4 others
23 June 2025
Several security issues were fixed in GSS NTLMSSP.
- Ubuntu 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
CVE-2023-25567, CVE-2023-25564, CVE-2023-25565 + 1 other
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