CVE-2018-7549

Name: CVE-2018-7549
Creator: NVD / NIST
Published: 2018-02-27T22:29:00.653+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.68%

Last modified Jun 17, 2026

CVE-2018-7549 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 2.68% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

2.68%

83.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Zsh	Zsh	<= 5.4.2
Redhat	Enterprise Linux Desktop	7.0
Redhat	Enterprise Linux Server	7.0
Redhat	Enterprise Linux Workstation	7.0
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	17.10

References

https://access.redhat.com/errata/RHSA-2018:3073Third Party Advisory
https://security.gentoo.org/glsa/201805-10Third Party Advisory
https://sourceforge.net/p/zsh/code/ci/c2cc8b0fbefc9868fa83537f5b6d90fc1ec438ddPatch, Third Party Advisory
https://usn.ubuntu.com/3593-1/Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3073Third Party Advisory
https://security.gentoo.org/glsa/201805-10Third Party Advisory
https://sourceforge.net/p/zsh/code/ci/c2cc8b0fbefc9868fa83537f5b6d90fc1ec438ddPatch, Third Party Advisory
https://usn.ubuntu.com/3593-1/Third Party Advisory

Timeline

Published: Feb 27, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-7549?

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.

How severe is CVE-2018-7549?

Severity scoring for CVE-2018-7549 is pending analysis. The EPSS model estimates a 2.68% probability of exploitation in the next 30 days.

How do I fix CVE-2018-7549?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-7549?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST