CVE-2019-6469

Name: CVE-2019-6469
Creator: NVD / NIST
Published: 2019-10-09T16:15:17.077+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.95%

Last modified Jun 17, 2026

CVE-2019-6469 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An error in the EDNS Client Subnet (ECS) feature for recursive resolvers can cause BIND to exit with an assertion failure when processing a response that has malformed RRSIGs. Versions affected: BIND 9.10.5-S1 -> 9.11.6-S1 of BIND 9 Supported Preview Edition.. EPSS estimates a 1.95% chance of exploitation in the next 30 days.

Description

An error in the EDNS Client Subnet (ECS) feature for recursive resolvers can cause BIND to exit with an assertion failure when processing a response that has malformed RRSIGs. Versions affected: BIND 9.10.5-S1 -> 9.11.6-S1 of BIND 9 Supported Preview Edition.

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

1.95%

77.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-617

Affected Software

Vendor	Product	Versions	Update
Isc	Bind	9.10.5	S1
Isc	Bind	9.11.6	S1

References

Timeline

Published: Oct 9, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-6469?

How severe is CVE-2019-6469?

CVE-2019-6469 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.95% probability of exploitation in the next 30 days.

How do I fix CVE-2019-6469?

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-2019-6469?

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

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Source: NVD / NIST