USN-8590-1: Exim vulnerabilities

Publication date

22 July 2026

Overview

Several security issues were fixed in Exim.


Packages

  • exim4 - Exim is a mail transport agent

Details

It was discovered that Exim incorrectly handled certain command line
options. A local attacker could possibly use this issue to access files
outside of the spool area.

It was discovered that Exim incorrectly handled string expansion in
.local files. A local attacker could possibly use this issue to escalate
privileges.

It was discovered that Exim incorrectly handled certain command line
options. A local attacker could possibly use this issue to access files
outside of the spool area.

It was discovered that Exim incorrectly handled string expansion in
.local files. A local attacker could possibly use this issue to escalate
privileges.

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 –  4.99.1-1ubuntu1.4
24.04 LTS noble exim4 –  4.97-4ubuntu4.7
22.04 LTS jammy exim4 –  4.95-4ubuntu2.11

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