Ubuntu Security Notices USN-8270-1 USN-8270-1: Exim vulnerability Publication date 12 May 2026 Overview Exim could be made to crash or run programs if it received specially crafted network traffic. Releases 26.04 LTS 25.10 24.04 LTS 22.04 LTS Open side navigation Close side navigation Packages Details Update instructions References Packages exim4 - Exim is a mail transport agent Details It was discovered that Exim incorrectly handled BDAT body parsing. A remote attacker could use this issue to cause Exim to crash, resulting in a denial of service, or possibly execute arbitrary code. It was discovered that Exim incorrectly handled BDAT body parsing. A remote attacker could use this issue to cause Exim 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 26.04 LTS resolute exim4 – 4.99.1-1ubuntu1.2 exim4-base – 4.99.1-1ubuntu1.2 eximon4 – 4.99.1-1ubuntu1.2 25.10 questing exim4 – 4.98.2-1ubuntu2.2 exim4-base – 4.98.2-1ubuntu2.2 eximon4 – 4.98.2-1ubuntu2.2 24.04 LTS noble exim4 – 4.97-4ubuntu4.5 exim4-base – 4.97-4ubuntu4.5 eximon4 – 4.97-4ubuntu4.5 22.04 LTS jammy exim4 – 4.95-4ubuntu2.8 exim4-base – 4.95-4ubuntu2.8 eximon4 – 4.95-4ubuntu2.8 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 https://launchpad.net/bugs/2152202