An issue was discovered in SoX 14.4.2. lsx_make_lpf in effect_i_dsp.c allows a NULL pointer dereference.
https://usn.ubuntu.com/4079-2/
https://usn.ubuntu.com/4079-1/
https://sourceforge.net/p/sox/bugs/318
https://lists.debian.org/debian-lts-announce/2019/05/msg00040.html