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
10 - 19 of 2033 results
4 March 2026
Several security issues were fixed in the Linux kernel.
- Ubuntu 22.04 LTS,
- 20.04 LTS
CVE ID
3 March 2026
The system could be made to run programs as an administrator.
- Ubuntu 25.10 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
27 February 2026
USN-5376-4 introduced a regression in Git
- Ubuntu 22.04 LTS,
- 20.04 LTS
26 February 2026
Several security issues were fixed in the Linux kernel.
- Ubuntu 24.04 LTS,
- 22.04 LTS
CVE ID
26 February 2026
Several security issues were fixed in Rack.
- Ubuntu 25.10 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS
CVE ID
25 February 2026
Several security issues were fixed in Authlib.
- Ubuntu 24.04 LTS,
- 22.04 LTS
CVE ID
CVE-2025-61920, CVE-2025-62706, CVE-2025-68158 + 2 others
25 February 2026
USN-5376-1 introduced a regression in Git
- Ubuntu 22.04 LTS,
- 20.04 LTS
25 February 2026
Protocol Buffers could be made to consume resources if it received specially crafted input.
- Ubuntu 25.10 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
25 February 2026
Several security issues were fixed in the Linux kernel.
- Ubuntu 22.04 LTS
CVE ID
25 February 2026
Several security issues were fixed in the Linux kernel.
- Ubuntu 24.04 LTS,
- 22.04 LTS
CVE ID
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