Double Free Affecting glibc package, versions <2.31-10


Severity

Recommended
0.0
low
0
10

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Threat Intelligence

EPSS
0.37% (30th percentile)

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  • Snyk IDSNYK-ECHOLATEST-GLIBC-18610915
  • published11 Aug 2026
  • disclosed24 Feb 2021

Introduced: 24 Feb 2021

CVE-2021-27645  (opens in a new tab)
CWE-415  (opens in a new tab)

How to fix?

Upgrade Echo:latest glibc to version 2.31-10 or higher.

NVD Description

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

The nameserver caching daemon (nscd) in the GNU C Library (aka glibc or libc6) 2.29 through 2.33, when processing a request for netgroup lookup, may crash due to a double-free, potentially resulting in degraded service or Denial of Service on the local system. This is related to netgroupcache.c.

CVSS Base Scores

version 3.1