CVE-2020-24387: Fedoraproject Fedora

High severity, CVSS 7.5. EPSS: 1.8% chance of exploitation in the next 30 days.

An issue was discovered in the yh_create_session() function of yubihsm-shell through 2.0.2. The function does not explicitly check the returned session id from the device. An invalid session id would lead to out-of-bounds read and write operations in the session array. This could be used by an attacker to cause a denial of service attack.

Affected products

• Fedoraproject Fedora: version 33 only
• Yubico Yubihsm-Shell: up to and including 2.0.2

Published 2020-10-19. Last modified 2026-06-17.