CVE-2021-3504: Debian Linux

Medium severity, CVSS 5.4. EPSS: 1.9% chance of exploitation in the next 30 days.

A flaw was found in the hivex library in versions before 1.3.20. It is caused due to a lack of bounds check within the hivex_open function. An attacker could input a specially crafted Windows Registry (hive) file which would cause hivex to read memory beyond its normal bounds or cause the program to crash. The highest threat from this vulnerability is to system availability.

Affected products

• Debian Debian Linux: version 9.0 only
• Fedoraproject Fedora: version 34 only
• Red Hat Enterprise Linux: version 6.0 only; version 7.0 only; version 8.0 only
• Red Hat Hivex: before 1.3.20 (fixed in 1.3.20)

Published 2021-05-11. Last modified 2026-06-17.