An issue was discovered in WavPack 5.1.0 and earlier. The WAV parser component contains a vulnerability that allows writing to memory because ParseRiffHeaderConfig in riff.c does not reject multiple format chunks.
https://www.debian.org/security/2018/dsa-4197
https://usn.ubuntu.com/3637-1/
https://seclists.org/bugtraq/2019/Dec/37
https://github.com/dbry/WavPack/issues/32
https://github.com/dbry/WavPack/issues/31
https://github.com/dbry/WavPack/issues/30
https://github.com/dbry/WavPack/commit/26cb47f99d481ad9b93eeff80d26e6b63bbd7e15
http://packetstormsecurity.com/files/155743/Slackware-Security-Advisory-wavpack-Updates.html