--- title: 'USN-7015-7: Python 2.7 regression | Ubuntu security notices' description: Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things. url: https://ubuntu.com/security/notices/USN-7015-7 --- 1. [Ubuntu Security Notices](https://ubuntu.com/security/notices) 2. USN-7015-7 --- # USN-7015-7: Python 2.7 regression Publication date 29 September 2025 Overview USN-7015-4 introduced a regression in Python 2.7 Releases [18.04 LTS](https://ubuntu.com/security/notices?release=bionic) [16.04 LTS](https://ubuntu.com/security/notices?release=xenial) --- Open side navigation ## Packages * [python2.7](https://ubuntu.com/security/cves?package=python2.7) - An interactive high-level object-oriented language ## Details USN-7015-4 fixed vulnerabilities in Python. It was discovered that the fix for [CVE-2023-27043](https://ubuntu.com/security/CVE-2023-27043) for python2.7 was incorrectly applied on Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. This update fixes the problem. We apologize for the inconvenience. Original advisory details: It was discovered that the Python email module incorrectly parsed email addresses that contain special characters. A remote attacker could possibly use this issue to bypass certain protection mechanisms. ([CVE-2023-27043](https://ubuntu.com/security/CVE-2023-27043)) It was discovered that Python allowed excessive backtracking while parsing certain tarfile headers. A remote attacker could possibly use this issue to cause Python to consume resources, leading to a denial of service. ([CVE-2024-6232](https://ubuntu.com/security/CVE-2024-6232)) It was discovered that the Python email module incorrectly quoted newlines ... --- Show more ## Update instructions In general, a standard system update will make all the necessary changes. [Learn more about how to get the fixes.](https://ubuntu.com/security/cves/about#security) The problem can be corrected by updating your system to the following package versions: | Ubuntu Release | Package Version | | --- | --- | | 18.04 LTS bionic | [libpython2.7](https://launchpad.net/ubuntu/+source/python2.7) –  2.7.17-1~18.04ubuntu1.13+esm13   Ubuntu Pro | | | | [python2.7](https://launchpad.net/ubuntu/+source/python2.7) –  2.7.17-1~18.04ubuntu1.13+esm13   Ubuntu Pro | | | | 16.04 LTS xenial | [libpython2.7](https://launchpad.net/ubuntu/+source/python2.7) –  2.7.12-1ubuntu0~16.04.18+esm18   Ubuntu Pro | | | | [python2.7](https://launchpad.net/ubuntu/+source/python2.7) –  2.7.12-1ubuntu0~16.04.18+esm18   Ubuntu Pro | | | --- ### Reduce your security exposure Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines. [Get Ubuntu Pro](https://ubuntu.com/pro) ## References * * [CVE-2023-27043](https://ubuntu.com/security/CVE-2023-27043) ## Related notices * [USN-7015-1](https://ubuntu.com/security/notices/USN-7015-1) * [USN-7015-3](https://ubuntu.com/security/notices/USN-7015-3) * [USN-7015-4](https://ubuntu.com/security/notices/USN-7015-4)