CVE-2022-23408: wolfSSL

Critical severity, CVSS 9.1. EPSS: 1.4% chance of exploitation in the next 30 days.

wolfSSL 5.x before 5.1.1 uses non-random IV values in certain situations. This affects connections (without AEAD) using AES-CBC or DES3 with TLS 1.1 or 1.2 or DTLS 1.1 or 1.2. This occurs because of misplaced memory initialization in BuildMessage in internal.c.

Affected products

• wolfSSL wolfSSL: from 5.0.0, before 5.1.1 (fixed in 5.1.1)

Published 2022-01-18. Last modified 2026-06-17.