CVE-2021-42374

MediumCVSS 5.3/10Last modified Jun 17, 2026

Description

An out-of-bounds heap read in Busybox's unlzma applet leads to information leak and denial of service when crafted LZMA-compressed input is decompressed. This can be triggered by any applet/format that

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H

Weakness enumeration

CWE-125

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

CVE-2021-423755.5An incorrect handling of a special element in Busybox's ash applet leads to denial of service when processing a crafted shell command, due tCVE-2021-423765.5A NULL pointer dereference in Busybox's hush applet leads to denial of service when processing a crafted shell command, due to missing validCVE-2021-423779.8An attacker-controlled pointer free in Busybox's hush applet leads to denial of service and possible code execution when processing a crafteCVE-2021-423787.2A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in theCVE-2021-423797.2A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in theCVE-2021-42389.1Randomly-generated alphanumeric strings contain significantly less entropy than expected. The RandomAlphaNumeric and CryptoRandomAlphaNumeriCVE-2021-423807.2A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in theCVE-2021-423817.2A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in theCVE-2021-423827.2A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in theCVE-2021-423837.2A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in theCVE-2021-423847.2A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in theCVE-2021-423857.2A 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
CVE-2021-42374: Medium severity, CVSS 5.3 | Vulnix