Ubuntu Security Notices USN-8340-1 USN-8340-1: LibreOffice vulnerability Publication date 28 May 2026 Overview LibreOffice could be made to crash or run programs as your login if it opened a specially crafted file. Releases 24.04 LTS 22.04 LTS Open side navigation Close side navigation Packages Details Update instructions References Packages libreoffice - Office productivity suite Details Duc Anh Nguyen discovered that LibreOffice incorrectly handled mismatched encryption salt parameters in crafted OOXML documents. An attacker could use this issue to cause LibreOffice to crash, resulting in a denial of service, or possibly execute arbitrary code. Duc Anh Nguyen discovered that LibreOffice incorrectly handled mismatched encryption salt parameters in crafted OOXML documents. An attacker could use this issue to cause LibreOffice to crash, resulting in a denial of service, or possibly execute arbitrary code. 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 24.04 LTS noble libreoffice – 4:24.2.7-0ubuntu0.24.04.5 22.04 LTS jammy libreoffice – 1:7.3.7-0ubuntu0.22.04.11 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-2026-4430 CVE-2026-4430