Ubuntu Security Notices USN-8503-1 USN-8503-1: ncurses vulnerability Publication date 2 July 2026 Overview ncurses could be made to crash if it opened a specially crafted file. Releases 20.04 LTS 18.04 LTS 16.04 LTS 14.04 LTS Open side navigation Close side navigation Packages Details Update instructions References Packages ncurses - shared libraries for terminal handling Details It was discovered that ncurses incorrectly handled certain terminfo entries in the infocmp tool. An attacker could possibly use this issue to cause a denial of service via a crafted terminfo file. The default compiler options for affected releases should reduce the vulnerability to a denial of service. It was discovered that ncurses incorrectly handled certain terminfo entries in the infocmp tool. An attacker could possibly use this issue to cause a denial of service via a crafted terminfo file. The default compiler options for affected releases should reduce the vulnerability to a denial of service. Update instructions In general, a standard system update will make all the necessary changes. Learn more about how to get the fixes. The problem can be corrected by updating your system to the following package versions: Ubuntu Release Package Version 20.04 LTS focal ncurses-bin – 6.2-0ubuntu2.1+esm1 Ubuntu Pro Fix available with Ubuntu Pro . 18.04 LTS bionic ncurses-bin – 6.1-1ubuntu1.18.04.1+esm3 Ubuntu Pro Fix available with Ubuntu Pro . 16.04 LTS xenial ncurses-bin – 6.0+20160213-1ubuntu1+esm6 Ubuntu Pro Fix available with Ubuntu Pro via Legacy Support add-on. 14.04 LTS trusty ncurses-bin – 5.9+20140118-1ubuntu1+esm6 Ubuntu Pro Fix available with Ubuntu Pro via Legacy Support add-on. 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 References CVE-2025-69720 CVE-2025-69720