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.
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USN ID, name, description or CVE ID contains
4 - 13 of 215 results
5 November 2025
poppler could be made to crash if it opened a specially crafted file.
- Ubuntu 25.10 ,
- 25.04 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS
CVE ID
4 November 2025
OpenStack Keystone could allow unintended access to network services.
- Ubuntu 25.10 ,
- 25.04 ,
- 24.04 LTS
4 November 2025
Several security issues were fixed in runC.
- Ubuntu 25.10 ,
- 25.04 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
4 November 2025
Unbound could be made to hijack domains if it received specially crafted network traffic.
- Ubuntu 25.10 ,
- 25.04 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
4 November 2025
libssh could be made to crash.
- Ubuntu 25.10 ,
- 25.04 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
3 November 2025
Google Guest Agent could allow unintended access to network services.
- Ubuntu 25.04 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
30 October 2025
libxml2 could be made to crash or run programs if it opened a specially crafted file.
- Ubuntu 25.04 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
29 October 2025
Several security issues were fixed in AMD Microcode.
- Ubuntu 25.04
CVE ID
29 October 2025
Several security issues were fixed in GNU binutils.
- Ubuntu 25.04 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
CVE-2025-11083, CVE-2025-1147, CVE-2025-5245 + 8 others
29 October 2025
Several security issues were fixed in X.Org X Server.
- Ubuntu 25.10 ,
- 25.04 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
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