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 3126 results
12 November 2026
Several security issues were fixed in Apache HTTP Server.
- Ubuntu 26.10 ,
- 26.04 LTS,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS,
- 14.04 LTS
CVE ID
CVE-2026-42356, CVE-2026-119618, CVE-2026-109163 + 2 others
12 November 2026
x11vnc could be made to expose sensitive information to local users.
- Ubuntu 20.04 LTS
CVE ID
12 November 2026
gevent could allow unintended access to network services.
- Ubuntu 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
12 November 2026
OpenConnect could be made to crash or run programs if it received specially crafted network traffic.
- Ubuntu 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
12 November 2026
tough-cookie could be made to modify application data if it received specially crafted cookies.
- Ubuntu 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS
CVE ID
12 November 2026
libjwt could be made to accept forged tokens.
- Ubuntu 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS
CVE ID
12 November 2026
Sudo could allow a local user to bypass time-based access restrictions.
- Ubuntu 20.04 LTS,
- 18.04 LTS
CVE ID
12 November 2026
Several security issues were fixed in Pillow.
- Ubuntu 26.10 ,
- 26.04 LTS,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS,
- 14.04 LTS
CVE ID
CVE-2026-96639, CVE-2026-96642, CVE-2026-112395 + 36 others
11 November 2026
SNMPTT could be made to run programs if it received specially crafted network traffic.
- Ubuntu 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
11 November 2026
ruby-jwt could allow unintended access to network services.
- Ubuntu 26.04 LTS,
- 24.04 LTS,
- 22.04 LTS,
- 20.04 LTS,
- 18.04 LTS,
- 16.04 LTS
CVE ID
Resources
Join the discussion
Get up to 15 years of security
maintenance for your new or established systems
Get up to 15 years of security maintenance for your entire Ubuntu Archive. Keep your systems stable with security backporting and avoid forced upgrades.