CVE-2019-6476

Name: CVE-2019-6476
Creator: NVD / NIST
Published: 2019-10-17T20:15:12.88+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.88%

Last modified Jun 17, 2026

CVE-2019-6476 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A defect in code added to support QNAME minimization can cause named to exit with an assertion failure if a forwarder returns a referral rather than resolving the query. This affects BIND versions 9.14.0 up to 9.14.6, and 9.15.0 up to 9.15.4.. EPSS estimates a 2.88% chance of exploitation in the next 30 days.

Description

A defect in code added to support QNAME minimization can cause named to exit with an assertion failure if a forwarder returns a referral rather than resolving the query. This affects BIND versions 9.14.0 up to 9.14.6, and 9.15.0 up to 9.15.4.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

2.88%

85.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-617

Affected Software

Vendor	Product	Versions
Isc	Bind	>= 9.14.0, <= 9.14.6
Isc	Bind	>= 9.15.0, <= 9.15.4

References

Timeline

Published: Oct 17, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-6476?

How severe is CVE-2019-6476?

CVE-2019-6476 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.88% probability of exploitation in the next 30 days.

How do I fix CVE-2019-6476?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-6476?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST