In params
In params.c in zsh through 5.4.2, there is a crash during a copy of an empty hash table, as demonstrated by typeset -p.
Exploitability
AV:N
AC:L
PR:N
UI:N
Scope
S:U
Impact
C:N
I:N
A:H
7.5/CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H