CVE-2021-42377

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

An attacker-controlled pointer free in Busybox's hush applet leads to denial of service and possible code execution when processing a crafted shell command, due to the shell mishandling the &&& string. This may be used for remote code execution under rare conditions of filtered command input.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-590CWE-763

Affected software

No affected versions have been published.

Timeline

Published
Nov 15, 2021
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2021

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CVE-2021-42377: Critical severity, CVSS 9.8 | Vulnix