CVE-2021-42374

medium
Published — · Modified —
CVSS v3
CVSS v2
VIR risk
5.5

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

Predictions

Exploit likelihood
20%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-42374.html

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-42374

OS impact

OSVersionStatusFixed in
debian debianbookwormfixed1:1.35.0-1
debian debianbullseyefixed1:1.30.1-6+deb11u1
debian debianforkyfixed1:1.35.0-1
debian debiansidfixed1:1.35.0-1
debian debiantrixiefixed1:1.35.0-1
arch archfixed1.34.1-1
suse slesaffected

References

Verify integrity in audit chain (admin only). AS-IS.