CVE-2016-9147 [High] | Input Validation Bypass in Bind

CVE-2016-9147 is rated Moderate Risk (59/100): CVSS High severity, with high exploitation likelihood (EPSS 36.42%, 97th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-03	56.16%	36.42%	-19.74%
2	2026-03-03	49.64%	56.16%	+6.52%
3	2026-01-26	—	49.64%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-03

56.16%

36.42%

-19.74%

2026-03-03

49.64%

56.16%

+6.52%

2026-01-26

—

49.64%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.5	3.0	HIGH	`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	3.6	[email protected]
5.0	2.0	MEDIUM	`AV:N/AC:L/Au:N/C:N/I:N/A:P` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:N) No authentication is required. Confidentiality impact (C:N) No confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:P) Partial availability impact.	10.0	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.5

3.0

HIGH

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

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

3.9

3.6

[email protected]

5.0

2.0

MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:L): Exploitation conditions are straightforward and predictable.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:N): No confidentiality impact.
Integrity impact (I:N): No integrity impact.
Availability impact (A:P): Partial availability impact.

10.0

2.9

[email protected]

OS Trackers for CVE-2016-9147

vendor	priority	summary	link
`alpine`	—	CVE-2016-9147: 1 source package rows (bind); 10 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 10, open 0.	https://security.alpinelinux.org/vuln/CVE-2016-9147
`debian`	not yet assigned	CVE-2016-9147 not yet assigned priority: Debian including 1 source packages (bind9), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2016-9147
`gentoo`	normal	CVE-2016-9147: 1 GLSA(s) (201708-01), 1 atom(s) (net-dns/bind); latest impact normal.	https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2016-9147
`redhat`	high	—	https://access.redhat.com/security/cve/CVE-2016-9147
`suse`	high	CVE-2016-9147 severity important: SUSE including 205 source package names (bind, bind-9.11.2-1.24, …), 410 product×package rows across 57 product lines (SUSE Liberty Linux 7, SUSE Linux Enterprise Desktop 12 SP1, … (57 product lines)): Fixed 330, Known Not Affected 80.	https://www.suse.com/security/cve/CVE-2016-9147/
`ubuntu`	medium	CVE-2016-9147 medium priority: Ubuntu including 1 source packages (bind9), 6 status rows across 6 suites (precise, trusty, upstream, xenial, yakkety, zesty): released 5, needs-triage 1.	https://ubuntu.com/security/CVE-2016-9147

Affected software / configurations for CVE-2016-9147

Vendor	Product	Version	Raw CPE
isc	bind	9.9.9	cpe:2.3:a:isc:bind:9.9.9:p4::::::
isc	bind	9.9.9	cpe:2.3:a:isc:bind:9.9.9:s6::::::
isc	bind	9.10.4	cpe:2.3:a:isc:bind:9.10.4:p4::::::
isc	bind	9.11.0	cpe:2.3:a:isc:bind:9.11.0:p1::::::

References for CVE-2016-9147

URL	Tags
http://rhn.redhat.com/errata/RHSA-2017-0062.html
http://rhn.redhat.com/errata/RHSA-2017-0063.html
http://rhn.redhat.com/errata/RHSA-2017-0064.html
http://www.debian.org/security/2017/dsa-3758
http://www.securityfocus.com/bid/95390
http://www.securitytracker.com/id/1037582
https://access.redhat.com/errata/RHSA-2017:1582
https://access.redhat.com/errata/RHSA-2017:1583
https://kb.isc.org/article/AA-01440/74/CVE-2016-9147	Patch Vendor Advisory
https://security.gentoo.org/glsa/201708-01
https://security.netapp.com/advisory/ntap-20180926-0005/

URL

CVE-2016-9147

Exploit prediction scoring system (EPSS) score for CVE-2016-9147

Common vulnerability scoring system (CVSS) metrics for CVE-2016-9147

Weakness enumeration for CVE-2016-9147

OS Trackers for CVE-2016-9147

Affected software / configurations for CVE-2016-9147

References for CVE-2016-9147