CVE-2018-20340: Debian Linux
Medium severity, CVSS 6.8. EPSS: 0.5% chance of exploitation in the next 30 days.
Yubico libu2f-host 1.1.6 contains unchecked buffers in devs.c, which could enable a malicious token to exploit a buffer overflow. An attacker could use this to attempt to execute malicious code using a crafted USB device masquerading as a security token on a computer where the affected library is currently in use. It is not possible to perform this attack with a genuine YubiKey.
Affected products
Published 2019-03-21. Last modified 2026-06-17.