CVE-2021-3445: Fedoraproject Fedora

High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days.

A flaw was found in libdnf's signature verification functionality in versions before 0.60.1. This flaw allows an attacker to achieve code execution if they can alter the header information of an RPM package and then trick a user or system into installing it. The highest risk of this vulnerability is to confidentiality, integrity, as well as system availability.

Affected products

• Fedoraproject Fedora: version 33 only; version 34 only
• Red Hat Enterprise Linux: version 8.0 only
• Rpm Libdnf: before 0.60.1 (fixed in 0.60.1)

Published 2021-05-19. Last modified 2026-06-17.