CVE-2026-34610 leancrypto: Integer truncation in X.509 name parser enables certificate identity impersonation

The leancrypto library is a cryptographic library that exclusively contains only PQC-resistant cryptographic algorithms. Prior to version 1.7.1, lcx509extractnamesegment casts sizet vlen to uint8t when storing the Common Name CN length. An attacker who crafts a certificate with CN = victim's CN +...