In nDPI through 3.2, the OpenVPN dissector is vulnerable to a heap-based buffer over-read in ndpi_search_openvpn in lib/protocols/openvpn.c.
https://github.com/ntop/nDPI/commit/8e7b1ea7a136cc4e4aa9880072ec2d69900a825e
https://github.com/fuzzing2026/CVE-PoCs/tree/main/ndpi-CVE-2020-15473