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-7365-1: NLTK vulnerabilities

24 March 2025

Several security issues were fixed in NLTK.

  • Ubuntu 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2021-43854, CVE-2021-3842

USN-7364-1: OpenSAML vulnerability

21 March 2025

OpenSAML and OpenSAML2 could have their authentication systems bypassed.

  • Ubuntu 25.04 ,
  • 24.10 ,
  • 24.04 LTS,
  • 22.04 LTS,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS

USN-7363-1: PAM-PKCS#11 vulnerabilities

20 March 2025

PAM-PKCS#11 could be used to bypass authentication.

  • Ubuntu 24.10 ,
  • 24.04 LTS,
  • 22.04 LTS,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS

CVE ID

CVE-2025-24032, CVE-2025-24531

USN-7360-1: Alpine vulnerabilities

20 March 2025

Several security issues were fixed in Alpine.

  • Ubuntu 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS

CVE ID

CVE-2021-46853, CVE-2020-14929, CVE-2021-38370

USN-7356-1: uriparser vulnerabilities

19 March 2025

Several security issues were fixed in uriparser.

  • Ubuntu 24.04 LTS,
  • 22.04 LTS,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2024-34403, CVE-2024-34402

USN-7352-2: FreeType vulnerabilities

17 March 2025

Several security issues were fixed in FreeType.

  • Ubuntu 18.04 LTS,
  • 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2022-27406, CVE-2025-27363

USN-7353-1: PlantUML vulnerability

17 March 2025

PlantUML could be made to crash or run programs as your login if it opened a specially crafted UML file.

  • Ubuntu 24.10 ,
  • 24.04 LTS,
  • 22.04 LTS,
  • 20.04 LTS,
  • 18.04 LTS,
  • 16.04 LTS

CVE ID

CVE-2022-1231

USN-7299-4: X.Org X Server regression

17 March 2025

Several security issues were fixed in X.Org X Server.

  • Ubuntu 18.04 LTS,
  • 16.04 LTS

CVE ID

CVE-2025-26598, CVE-2025-26597, CVE-2025-26600 + 5 others

USN-7344-2: Linux kernel vulnerabilities

13 March 2025

Several security issues were fixed in the Linux kernel.

  • Ubuntu 18.04 LTS,
  • 16.04 LTS,
  • 14.04 LTS

CVE ID

CVE-2024-43893, CVE-2024-26685, CVE-2025-0927 + 36 others

USN-7343-2: Jinja2 regression

12 March 2025

USN-7343-1 introduced a regression in Jinja2.

  • Ubuntu 20.04 LTS,
  • 18.04 LTS
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