CVE-2018-6198: Canonical Ubuntu Linux

Medium severity, CVSS 4.7. EPSS: 0.4% chance of exploitation in the next 30 days.

w3m through 0.5.3 does not properly handle temporary files when the ~/.w3m directory is unwritable, which allows a local attacker to craft a symlink attack to overwrite arbitrary files.

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.