CVE-2018-12436: wolfSSL

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

wolfcrypt/src/ecc.c in wolfSSL before 3.15.1.patch allows a memory-cache side-channel attack on ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP. To discover an ECDSA key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.

Affected products

• wolfSSL wolfSSL: before 3.15.3 (fixed in 3.15.3)

Published 2018-06-15. Last modified 2026-06-17.