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 9862 results
26 September 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 22.04 LTS
CVE ID
CVE-2025-38444, CVE-2025-38086, CVE-2025-38515 + 140 others
26 September 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 24.04 LTS
CVE ID
CVE-2025-38071, CVE-2025-38130, CVE-2025-38301 + 181 others
26 September 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 22.04 LTS
CVE ID
CVE-2025-21981, CVE-2025-21881, CVE-2025-21972 + 100 others
25 September 2025
sha.js could be made to consume resources or return incorrect hash values if it received specially crafted input.
- Ubuntu 25.04 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS
CVE ID
25 September 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 22.04 LTS
CVE ID
CVE-2025-21970, CVE-2025-21915, CVE-2025-21883 + 98 others
25 September 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 24.04 LTS,
- 22.04 LTS
CVE ID
CVE-2025-21981, CVE-2025-21881, CVE-2025-21972 + 104 others
25 September 2025
PCRE2 could be made to expose sensitive information.
- Ubuntu 25.04
CVE ID
25 September 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 22.04 LTS,
- 20.04 LTS
CVE ID
CVE-2025-38312, CVE-2025-38337, CVE-2025-38345 + 139 others
25 September 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 25.04 ,
- 24.04 LTS
CVE ID
CVE-2025-38106, CVE-2025-38123, CVE-2025-38128 + 180 others
25 September 2025
Several security issues were fixed in the Linux kernel.
- Ubuntu 20.04 LTS
CVE ID
CVE-2025-38203, CVE-2025-38312, CVE-2025-37958 + 143 others
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