========================================================================== Ubuntu Security Notice USN-8270-1 May 12, 2026
exim4 vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 26.04 LTS - Ubuntu 25.10 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: Exim could be made to crash or run programs if it received specially crafted network traffic. Software Description: - 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. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 26.04 LTS exim4 4.99.1-1ubuntu1.2 exim4-base 4.99.1-1ubuntu1.2 eximon4 4.99.1-1ubuntu1.2 Ubuntu 25.10 exim4 4.98.2-1ubuntu2.2 exim4-base 4.98.2-1ubuntu2.2 eximon4 4.98.2-1ubuntu2.2 Ubuntu 24.04 LTS exim4 4.97-4ubuntu4.5 exim4-base 4.97-4ubuntu4.5 eximon4 4.97-4ubuntu4.5 Ubuntu 22.04 LTS exim4 4.95-4ubuntu2.8 exim4-base 4.95-4ubuntu2.8 eximon4 4.95-4ubuntu2.8 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-8270-1 https://launchpad.net/bugs/2152202 Package Information: https://launchpad.net/ubuntu/+source/exim4/4.99.1-1ubuntu1.2 https://launchpad.net/ubuntu/+source/exim4/4.98.2-1ubuntu2.2 https://launchpad.net/ubuntu/+source/exim4/4.97-4ubuntu4.5 https://launchpad.net/ubuntu/+source/exim4/4.95-4ubuntu2.8
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