async.c and dict.c in libhiredis.a in hiredis through 0.14.0 allow a NULL pointer dereference because malloc return values are unchecked.
github.com/redis/hiredis/issues/747
lists.debian.org/debian-lts-announce/2020/01/msg00028.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/76ZDGWBV3YEEQ2YC65ZJEQLKQFVFBZHX/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZKOTCIYFEWJJILUGL4JQ3CJAM3TWYZ2A/