CVE-2020-8793: Canonical Ubuntu Linux

Medium severity, CVSS 4.7. EPSS: 0.9% chance of exploitation in the next 30 days.

OpenSMTPD before 6.6.4 allows local users to read arbitrary files (e.g., on some Linux distributions) because of a combination of an untrusted search path in makemap.c and race conditions in the offline functionality in smtpd.c.

Affected products

• Canonical Ubuntu Linux: version 18.04 only; version 19.10 only
• Fedoraproject Fedora: version 32 only
• OpenSMTPD OpenSMTPD: before 6.6.4 (fixed in 6.6.4)

Published 2020-02-25. Last modified 2026-06-17.