CVE-2020-24388: Fedoraproject Fedora

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

An issue was discovered in the _send_secure_msg() function of yubihsm-shell through 2.0.2. The function does not validate the embedded length field of a message received from the device. This could lead to an oversized memcpy() call that will crash the running process. This could be used by an attacker to cause a denial of service.

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.