CVE-2018-14358: Canonical Ubuntu Linux

Critical severity, CVSS 9.8. EPSS: 3.9% chance of exploitation in the next 30 days.

An issue was discovered in Mutt before 1.10.1 and NeoMutt before 2018-07-16. imap/message.c has a stack-based buffer overflow for a FETCH response with a long RFC822.SIZE field.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only; version 18.04 only
• Debian Debian Linux: version 8.0 only; version 9.0 only
• Mutt Mutt: before 1.10.1 (fixed in 1.10.1)
• Neomutt Neomutt: before 20180716 (fixed in 20180716)

Published 2018-07-17. Last modified 2026-06-17.