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
21 - 30 of 10857 results
22 June 2026
Several security issues were fixed in libxml2.
- Ubuntu 26.04 LTS,
- 25.10
CVE ID
22 June 2026
Several security issues were fixed in HAProxy.
- Ubuntu 26.04 LTS,
- 25.10 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
22 June 2026
Several security issues were fixed in nginx.
- Ubuntu 26.04 LTS,
- 25.10 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
22 June 2026
Several security issues were fixed in MySQL.
- Ubuntu 26.04 LTS,
- 25.10 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
22 June 2026
libxml2 could be made to crash or run programs if it received specially crafted input.
- Ubuntu 24.04 LTS,
- 22.04 LTS
CVE ID
22 June 2026
Several security issues were fixed in Netatalk.
- Ubuntu 26.04 LTS,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS,
- 14.04 LTS
CVE ID
18 June 2026
Several security issues were fixed in LXD.
- Ubuntu 18.04 LTS,
- 16.04 LTS
CVE ID
CVE-2026-39830, CVE-2026-39833, CVE-2026-39834 + 1 other
18 June 2026
Several security issues were fixed in libheif.
- Ubuntu 26.04 LTS,
- 25.10 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS
CVE ID
CVE-2026-32740, CVE-2026-3950, CVE-2026-41071 + 6 others
18 June 2026
pbkdf2 could be made to generate predictable cryptographic keys if it received specially crafted input.
- Ubuntu 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS
CVE ID
18 June 2026
Several security issues were fixed in Net::CIDR::Lite.
- Ubuntu 26.04 LTS,
- 25.10 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
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