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 181 results
6 October 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 25.04 ,
- 24.04 LTS
CVE ID
CVE-2025-38617, CVE-2025-38500, CVE-2025-38477 + 1 other
6 October 2025
HAProxy could be made to crash if it received specially crafted network traffic.
- Ubuntu 25.04 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
6 October 2025
Squid could be made to crash if it received specially crafted network traffic.
- Ubuntu 25.04 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
6 October 2025
poppler could be made to crash if it opened a specially crafted file.
- Ubuntu 25.04 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
2 October 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 25.04
CVE ID
CVE-2025-38618, CVE-2025-38477, CVE-2025-38244 + 3 others
2 October 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 25.04 ,
- 24.04 LTS
CVE ID
CVE-2025-38477, CVE-2025-38618, CVE-2025-38500 + 1 other
1 October 2025
Several security issues were fixed in Django.
- Ubuntu 25.04 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS,
- 14.04 LTS
CVE ID
30 September 2025
Several security issues were fixed in OpenSSL.
- Ubuntu 25.04 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS,
- 14.04 LTS
CVE ID
29 September 2025
Open VM Tools could be made to run programs as an administrator.
- Ubuntu 25.04 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS
CVE ID
29 September 2025
Rack could be made to crash if it received specially crafted network traffic.
- Ubuntu 25.04 ,
- 24.04 LTS
CVE ID
Resources
Join the discussion
Canonical is offering
Expanded Security Maintenance
Canonical is offering Ubuntu Expanded Security Maintenance (ESM) for security fixes and essential packages.