Double Free Affecting c-ares package, versions <1.16.1-1


Severity

Recommended
0.0
low
0
10

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Threat Intelligence

EPSS
0.53% (41st percentile)

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  • Snyk IDSNYK-ECHOLATEST-CARES-19643591
  • published8 Sept 2026
  • disclosed13 May 2021

Introduced: 13 May 2021

CVE-2020-14354  (opens in a new tab)
CWE-415  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Echo:latest c-ares to version 1.16.1-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream c-ares package and not the c-ares package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

A possible use-after-free and double-free in c-ares lib version 1.16.0 if ares_destroy() is called prior to ares_getaddrinfo() completing. This flaw possibly allows an attacker to crash the service that uses c-ares lib. The highest threat from this vulnerability is to this service availability.

CVSS Base Scores

version 3.1