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
2 - 11 of 889 results
16 February 2026
Several security issues were fixed in GnuTLS.
- Ubuntu 25.10 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
16 February 2026
Several security issues were fixed in FreeRDP.
- Ubuntu 25.10 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS
CVE ID
CVE-2026-23948, CVE-2026-24680, CVE-2026-24676 + 9 others
16 February 2026
Several security issues were fixed in Expat.
- Ubuntu 24.04 LTS
CVE ID
16 February 2026
.NET could be made to bypass security features.
- Ubuntu 24.04 LTS
CVE ID
13 February 2026
Several security issues were fixed in AIOHTTP.
- Ubuntu 25.10 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS
CVE ID
CVE-2025-69225, CVE-2025-69229, CVE-2025-69228 + 4 others
12 February 2026
MUNGE could be made to crash or run programs as your login if it opened a specially crafted file.
- Ubuntu 25.10 ,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS,
- 14.04 LTS
CVE ID
12 February 2026
libpng could be made to crash if it opened a specially crafted file.
- Ubuntu 25.10 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
12 February 2026
nginx could be made to insert content into proxied server data.
- Ubuntu 25.10 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
12 February 2026
Several security issues were fixed in dnsdist.
- Ubuntu 25.10 ,
- 24.04 LTS,
- 22.04 LTS
CVE ID
11 February 2026
Several security issues were fixed in the Linux kernel.
- Ubuntu 24.04 LTS,
- 22.04 LTS
CVE ID
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