What’s Vulnerable › Vulnerabilities

CVE-2018-7549

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.6% 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-20

Description

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.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 17.10
• RedHat Enterprise Linux Desktop: 7.0
• RedHat Enterprise Linux Server: 7.0
• RedHat Enterprise Linux Workstation: 7.0
• zsh: through 5.4.2

References

• https://access.redhat.com/errata/RHSA-2018:3073
• https://security.gentoo.org/glsa/201805-10
• https://sourceforge.net/p/zsh/code/ci/c2cc8b0fbefc9868fa83537f5b6d90fc1ec438dd
• https://usn.ubuntu.com/3593-1/
• https://access.redhat.com/errata/RHSA-2018:3073
• https://security.gentoo.org/glsa/201805-10
• https://sourceforge.net/p/zsh/code/ci/c2cc8b0fbefc9868fa83537f5b6d90fc1ec438dd
• https://usn.ubuntu.com/3593-1/

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