See here: http://www.openwall.com/lists/oss-security/2017/01/23/4 4 out of bounds read errors, yet all fixed in one commit. Upstream version 5.1.0 contains the fix, please bump.
wavpack 5.1.0 can go stable i think
@ Arches, please test and mark stable: =media-sound/wavpack-5.1.0
amd64 stable
x86 stable
Stable for PPC64.
Stable for HPPA.
Stable on alpha.
ppc stable
sparc stable
ia64 stable
arm stable, all arches done.
GLSA Vote: No