NULL Pointer Dereference Vulnerability in zsh through 5.4.2

CVE-2018-7548 · HIGH Severity

AV:N/AC:L/AU:N/C:P/I:P/A:P

In subst.c in zsh through 5.4.2, there is a NULL pointer dereference when using ${(PA)...} on an empty array result.

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