Use After Free Affecting busybox package, versions <1:1.35.0-1


Severity

Recommended
0.0
high
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
2.22% (82nd percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-ECHOLATEST-BUSYBOX-18021424
  • published20 Jul 2026
  • disclosed15 Nov 2021

Introduced: 15 Nov 2021

CVE-2021-42383  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Echo:latest busybox to version 1:1.35.0-1 or higher.

NVD Description

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

A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the evaluate function

CVSS Base Scores

version 3.1