CVE-2021-28831

HIGH7.5EPSS 1.0%

busybox - security update

Published: 3/19/2021Modified: 4/28/2026

Also known as:ALPINE-CVE-2021-28831DEBIAN-CVE-2021-28831

Description

decompress_gunzip.c in BusyBox through 1.32.1 mishandles the error bit on the huft_build result pointer, with a resultant invalid free or segmentation fault, via malformed gzip data.

Affected packages (4)

Alpine/busyboxfrom 0, < 1.30.1-r5
Debian/busyboxfrom 0, < 1:1.30.1-6+deb11u1
Debian/busyboxfrom 0, < 1:1.22.0-19+deb9u2
Debian/busyboxfrom 0, < 1:1.30.1-6+deb11u1

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	HIGH7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References (2)

ADVISORYhttps://security.alpinelinux.org/vuln/CVE-2021-28831
ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2021-28831