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 931 results
4 March 2026
Several security issues were fixed in GIMP.
- Ubuntu 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
CVE-2025-48798, CVE-2025-14422, CVE-2025-2760 + 2 others
4 March 2026
Several security issues were fixed in QEMU.
- Ubuntu 25.10 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
CVE-2026-0665, CVE-2025-14876, CVE-2025-11234 + 2 others
4 March 2026
Several security issues were fixed in the Linux kernel.
- Ubuntu 24.04 LTS
CVE ID
CVE-2025-38476, CVE-2025-37875, CVE-2025-38023 + 750 others
4 March 2026
Several security issues were fixed in the Linux kernel.
- Ubuntu 24.04 LTS
CVE ID
CVE-2025-37956, CVE-2025-37748, CVE-2025-38080 + 750 others
4 March 2026
Several security issues were fixed in the Linux kernel.
- Ubuntu 24.04 LTS
CVE ID
4 March 2026
Several security issues were fixed in PostgreSQL.
- Ubuntu 25.10 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
CVE-2026-2003, CVE-2026-2006, CVE-2026-2004 + 1 other
4 March 2026
NSS could be made to crash or run programs if it received specially crafted network traffic.
- Ubuntu 25.10 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
4 March 2026
Several security issues were fixed in ImageMagick.
- Ubuntu 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS,
- 14.04 LTS
CVE ID
CVE-2026-25968, CVE-2026-25898, CVE-2026-25986 + 4 others
4 March 2026
Several security issues were fixed in the kernel.
- Ubuntu 25.10 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS
CVE ID
CVE-2025-40214, CVE-2025-22036, CVE-2025-21726 + 4 others
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
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