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Ubuntu 26.04 Python Critical Issues Denial of Service Update USN-8509-1

ubuntu
Calendar Grey July 6, 2026
Dist Ubuntu Esm H88
Several security issues in Python for Ubuntu have been fixed, including critical threats. Update to ensure security.
Several security issues were fixed in Python.

Summary

Several security issues were fixed in Python.

Software Description:

- python3.14: An interactive high-level object-oriented language

- python3.12: An interactive high-level object-oriented language

- python3.10: An interactive high-level object-oriented language

Details:

It was discovered that Python incorrectly normalized paths in the tarfile

module. An attacker could possibly use this issue to bypass path

restrictions. This issue only affected Ubuntu 22.04 LTS and Ubuntu 24.04

LTS. (CVE-2025-13462)

It was discovered that Python's HTMLParser incorrectly handled certain

malformed HTML input. An attacker could possibly use this issue to cause

Python to crash, resulting in a denial of service. This issue only affected

Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2025-69534)

It was discovered that Python's email module incorrectly quoted newlines

in headers. An attacker could possibly use this issue to inject arbitrary

email headers. This issue only affected Ubuntu 22.04 LTS and U...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu python path traversal

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 26.04 LTS
  libpython3.14                   3.14.4-1ubuntu0.1
  python3.14                      3.14.4-1ubuntu0.1

Ubuntu 24.04 LTS
  libpython3.12t64                3.12.3-1ubuntu0.15
  python3.12                      3.12.3-1ubuntu0.15

Ubuntu 22.04 LTS
  libpython3.10                   3.10.12-1~22.04.16
  python3.10                      3.10.12-1~22.04.16

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-8509-1

CVE-2021-4189, CVE-2025-13462, CVE-2025-69534, CVE-2026-0672,

CVE-2026-1299, CVE-2026-1502, CVE-2026-2297, CVE-2026-3276,

CVE-2026-3644, CVE-2026-4224, CVE-2026-4519, CVE-2026-4786,

CVE-2026-5713, CVE-2026-6019, CVE-2026-6100, CVE-2026-7774,

CVE-2026-8328, CVE-2026-9669

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8509-1

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu python path traversal

Package Information

https://launchpad.net/ubuntu/+source/python3.14/3.14.4-1ubuntu0.1
https://launchpad.net/ubuntu/+source/python3.12/3.12.3-1ubuntu0.15
https://launchpad.net/ubuntu/+source/python3.10/3.10.12-1~22.04.16

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