Ubuntu Security Notices USN-8249-1 USN-8249-1: dpkg vulnerability Publication date 7 May 2026 Overview dpkg could be made to stop responding if it opened a specially crafted file. Releases 25.10 24.04 LTS Open side navigation Close side navigation Packages Details Update instructions References Packages dpkg - Debian package management system Details Yashashree Gund discovered that the dpkg dpkg-deb tool incorrectly handled certain zstd-compressed .deb archives. If a user or automated system were tricked into manipulating a specially crafted .deb archive, a remote attacker could possibly use this issue to cause dpkg-deb to stop responding, resulting in a denial of service. Yashashree Gund discovered that the dpkg dpkg-deb tool incorrectly handled certain zstd-compressed .deb archives. If a user or automated system were tricked into manipulating a specially crafted .deb archive, a remote attacker could possibly use this issue to cause dpkg-deb to stop responding, 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 25.10 questing dpkg – 1.22.21ubuntu3.2 24.04 LTS noble dpkg – 1.22.6ubuntu6.6 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-2026-2219 CVE-2026-2219