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CVE-2019-6476

25
FAUCET Score

CVE-2019-6476 describes a critical assertion failure vulnerability in BIND versions 9.14.0-9.14.6 and 9.15.0-9.15.4, specifically within the QNAME minimization code. This defect causes the 'named' process to crash if a forwarder returns a referral instead of resolving a query. With a CVSSv3.1 score of 7.5 (High), this vulnerability is remotely exploitable with low attack complexity, requiring no user interaction or privileges, and leading to a complete denial of service (availability impact). There is currently no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 9.14.0, <= 9.14.6CPE matchmatch criteria
cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*
>= 9.15.0, <= 9.15.4CPE matchmatch criteria
cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.91%
Probability of exploitation in next 30 days
EPSS Percentile
85.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0291 is in the 74th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2019-6476Moderate

bind: An error in QNAME minimization code can cause BIND to exit with an assertion failure

Oct 16, 2019

References

kb.isc.org / docs/cve-2019-6476
Third Party Advisory
security.netapp.com / advisory/ntap-20191024-0004
support.f5.com / csp/article/K42238532