CVE-2021-42374: Busybox

Medium severity, CVSS 5.3. EPSS: 0.6% chance of exploitation in the next 30 days.

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

Affected products

• Busybox Busybox: from 1.27.0, up to and including 1.33.1
• Fedoraproject Fedora: version 33 only; version 34 only
• Netapp Cloud Backup: affected versions not specified
• Netapp h300e Firmware: affected versions not specified
• Netapp h300s Firmware: affected versions not specified
• Netapp h410s Firmware: affected versions not specified
• Netapp h500e Firmware: affected versions not specified
• Netapp h500s Firmware: affected versions not specified
• Netapp h700e Firmware: affected versions not specified
• Netapp h700s Firmware: affected versions not specified
• Netapp Hci Management Node: affected versions not specified
• Netapp Solidfire: affected versions not specified

Published 2021-11-15. Last modified 2026-06-17.