Affected versions of this crate did not properly implements the Matrix::zip_elements method, which causes an double free when the given trait implementation might panic. This allows an attacker to corrupt or take control of the memory.

References

• https://nvd.nist.gov/vuln/detail/CVE-2019-16880
• strake/linea.rs#2
• https://rustsec.org/advisories/RUSTSEC-2019-0021.html