CVE-2019-10190: Fedoraproject Fedora

High severity, CVSS 7.5. EPSS: 2% chance of exploitation in the next 30 days.

A vulnerability was discovered in DNS resolver component of knot resolver through version 3.2.0 before 4.1.0 which allows remote attackers to bypass DNSSEC validation for non-existence answer. NXDOMAIN answer would get passed through to the client even if its DNSSEC validation failed, instead of sending a SERVFAIL packet. Caching is not affected by this particular bug but see CVE-2019-10191.

Affected products

• Fedoraproject Fedora: version 29 only; version 30 only
• Nic Knot Resolver: up to and including 3.2.0; from 4.0.0, before 4.1.0 (fixed in 4.1.0)

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