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CVE-2016-9444

26
FAUCET Score

CVE-2016-9444 is a high-severity denial-of-service vulnerability affecting ISC BIND versions 9.x, 9.10.x, and 9.11.x before specific patch levels. A remote attacker can exploit this flaw by sending a specially crafted DS resource record in an answer, leading to an assertion failure and daemon exit. With a CVSS score of 7.5, this vulnerability is easily exploitable over the network with low attack complexity, resulting in a complete loss of availability for affected BIND servers. While no public exploit code or active exploitation has been reported, the vulnerability has garnered some community discussion and media coverage, indicating its potential impact.

Impacted Technologies

VendorProductVersion(s)CPE
9.0CPE matchmatch criteria
cpe:2.3:a:isc:bind:9.0:*:*:*:*:*:*:*
9.0.0CPE matchmatch criteria
cpe:2.3:a:isc:bind:9.0.0:rc1:*:*:*:*:*:*
9.0.0CPE matchmatch criteria
cpe:2.3:a:isc:bind:9.0.0:rc2:*:*:*:*:*:*
9.0.0CPE matchmatch criteria
cpe:2.3:a:isc:bind:9.0.0:rc3:*:*:*:*:*:*
9.0.0CPE matchmatch criteria
cpe:2.3:a:isc:bind:9.0.0:rc4:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
18.27%
Probability of exploitation in next 30 days
EPSS Percentile
96.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.1827 is in the 95th percentile among its peer group of 51,553 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

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

Remediation

Patch Available

Vendor Patches (2)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: bind-32:9.9.4-38.el7_3.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7.2 Extended Update SupportFixed in: bind-32:9.9.4-29.el7_2.6
View patch

Vendor Advisories (1)

redhatCVE-2016-9444Important

bind: assertion failure while handling an unusually-formed DS record response

Jan 11, 2017

References

rhn.redhat.com / errata/RHSA-2017-0062.html
access.redhat.com / errata/RHSA-2017:1583
h20566.www2.hpe.com / portal/site/hpsc/public/kb/docDisplay
kb.isc.org / article/AA-01441/74/CVE-2016-9444
PatchVendor Advisory
security.gentoo.org / glsa/201708-01
security.netapp.com / advisory/ntap-20180926-0005
debian.org / security/2017/dsa-3758
securityfocus.com / bid/95393
securitytracker.com / id/1037582