Out-of-bounds Write Affecting mongodb package, versions *


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
2.02% (80th percentile)

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  • Snyk IDSNYK-UBUNTU1804-MONGODB-2767751
  • published26 Feb 2026
  • disclosed12 Apr 2022

Introduced: 12 Apr 2022

CVE-2021-32040  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

There is no fixed version for Ubuntu:18.04 mongodb.

NVD Description

Note: Versions mentioned in the description apply only to the upstream mongodb package and not the mongodb package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

It may be possible to have an extremely long aggregation pipeline in conjunction with a specific stage/operator and cause a stack overflow due to the size of the stack frames used by that stage. If an attacker could cause such an aggregation to occur, they could maliciously crash MongoDB in a DoS attack. This vulnerability affects MongoDB Server v4.4 versions prior to and including 4.4.28, MongoDB Server v5.0 versions prior to 5.0.4 and MongoDB Server v4.2 versions prior to 4.2.16.

Workaround: >= v4.2.16 users and all v4.4 users can add the --setParameter internalPipelineLengthLimit=50 instead of the default 1000 to mongod at startup to prevent a crash.

CVSS Base Scores

version 3.1