CVE-2019-10191: Fedoraproject Fedora

High severity, CVSS 7.5. EPSS: 1.9% chance of exploitation in the next 30 days.

A vulnerability was discovered in DNS resolver of knot resolver before version 4.1.0 which allows remote attackers to downgrade DNSSEC-secure domains to DNSSEC-insecure state, opening possibility of domain hijack using attacks against insecure DNS protocol.

Affected products

• Fedoraproject Fedora: version 29 only; version 30 only
• Nic Knot Resolver: before 4.1.0 (fixed in 4.1.0)

Published 2019-07-16. Last modified 2026-06-17.