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An out-of-bounds heap read in Busybox's unlzma applet...

Critical severity Unreviewed Published May 24, 2022 to the GitHub Advisory Database • Updated May 5, 2025

Package

No package listed— Suggest a package

Affected versions

Unknown

Patched versions

Unknown

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

References

Published by the National Vulnerability Database Nov 15, 2021
Published to the GitHub Advisory Database May 24, 2022
Last updated May 5, 2025

Severity

Critical

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(22nd percentile)

Weaknesses

Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer. Learn more on MITRE.

CVE ID

CVE-2021-42374

GHSA ID

GHSA-6f92-r9cq-v6cq

Source code

No known source code

Dependabot alerts are not supported on this advisory because it does not have a package from a supported ecosystem with an affected and fixed version.

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