CVE-2018-7548

zsh: null-pointer deref when using ${(PA)...} on an empty array result

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Severity

Low

Red Hat Product Security

2.8

CVSS 3.0

Review impact separately from score.

Published · March 24, 2017

Updated · November 22, 2025

Description

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

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 2.8
CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L

CWE-476 · NULL Pointer Dereference