A vulnerability (CVE-2026-42798) in the Little CMS (lcms2) library allows an attacker to cause a denial of service by crashing the application through a specially crafted, malformed ICC profile. The issue affects Ubuntu 26.04 LTS (liblcms2-2 version 2.17-1ubuntu0.1 and earlier) and Ubuntu 25.10 (liblcms2-2 version 2.16-2ubuntu0.1 and earlier). The flaw is corrected by updating to liblcms2-2 version 2.17-1ubuntu0.2 for Ubuntu 26.04 LTS and version 2.16-2ubuntu0.2 for Ubuntu 25.10 via a standard system update.
Ubuntu Security Notices USN-8250-1 USN-8250-1: Little CMS vulnerability Publication date 7 May 2026 Overview Little CMS could be made to crash if it opened a specially crafted ICC profile. Releases 26.04 LTS 25.10 Open side navigation Close side navigation Packages Details Update instructions References Packages lcms2 - Little CMS color management library Details It was discovered that Little CMS incorrectly handled certain malformed ICC profiles. An attacker could possibly use this issue to cause Little CMS to crash, resulting in a denial of service. It was discovered that Little CMS incorrectly handled certain malformed ICC profiles. An attacker could possibly use this issue to cause Little CMS to crash, resulting in 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 26.04 LTS resolute liblcms2-2 – 2.17-1ubuntu0.2 25.10 questing liblcms2-2 – 2.16-2ubuntu0.2 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-2026-42798 CVE-2026-42798