An issue was discovered in the smallvec crate before 0.6.13 for Rust. It can create an uninitialized value of any type, including a reference type.
{ "versions": [ { "introduced": "0" }, { "fixed": "0.6.13" } ] }
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-25023.json"