CVE-2018-6197: Canonical Ubuntu Linux

High severity, CVSS 7.5. EPSS: 4.4% chance of exploitation in the next 30 days.

w3m through 0.5.3 is prone to a NULL pointer dereference flaw in formUpdateBuffer in form.c.

Affected products

• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only; version 16.04 only; version 17.10 only
• Tats w3m: up to and including 0.5.3

Published 2018-01-25. Last modified 2026-06-17.