CVE-2021-3622: Fedoraproject Fedora

Medium severity, CVSS 4.3. EPSS: 4.8% chance of exploitation in the next 30 days.

A flaw was found in the hivex library. This flaw allows an attacker to input a specially crafted Windows Registry (hive) file, which would cause hivex to recursively call the _get_children() function, leading to a stack overflow. The highest threat from this vulnerability is to system availability.

Affected products

• Fedoraproject Fedora: version 33 only; version 34 only
• Red Hat Enterprise Linux: version 6.0 only; version 7.0 only; version 8.0 only
• Red Hat Enterprise Linux Workstation: version 7.0 only
• Red Hat Hivex: before 1.3.21 (fixed in 1.3.21)

Published 2021-12-23. Last modified 2026-06-17.