What’s Vulnerable › Vulnerabilities

CVE-2018-7548

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-02-27 · updated 2026-06-17
• Weakness: CWE-476

Description

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

Affected products

• Canonical Ubuntu Linux: 17.10
• zsh: through 5.4.2

References

• https://security.gentoo.org/glsa/201805-10
• https://sourceforge.net/p/zsh/code/ci/110b13e1090bc31ac1352b28adc2d02b6d25a102
• https://usn.ubuntu.com/3593-1/
• https://security.gentoo.org/glsa/201805-10
• https://sourceforge.net/p/zsh/code/ci/110b13e1090bc31ac1352b28adc2d02b6d25a102
• https://usn.ubuntu.com/3593-1/

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