HIGH
CVE-2016-9840
NVD-CWE-noinfoPublished: May 23, 2017· Updated: Jul 14, 2026
8.8
CVSS v3.1
Official Description
inftrees.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact by leveraging improper pointer arithmetic.
Technical Analysis
CVE-2016-9840 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected Vendors & Products
Apple4 product(s)
iphone osmac os xtvoswatchos
boost1 product(s)
boost
Canonical1 product(s)
ubuntu linux
Debian1 product(s)
debian linux
Node.js1 product(s)
node.js
openSUSE2 product(s)
leapopensuse
Oracle4 product(s)
database serverjdkjremysql
Red Hat5 product(s)
satelliteenterprise linux desktopenterprise linux eusenterprise linux serverenterprise linux workstation
zlib1 product(s)
zlib
Source: NVD CPE · 30 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
ADVISORYhttps://usn.ubuntu.com/4246-1/
ADVISORYhttps://usn.ubuntu.com/4292-1/
ADVISORYhttps://usn.ubuntu.com/4246-1/
ADVISORYhttps://usn.ubuntu.com/4292-1/
All References (61)
→
http://lists.opensuse.org/opensuse-updates/2016-12/msg00127.htmlThird Party Advisory
→
http://lists.opensuse.org/opensuse-updates/2017-01/msg00050.htmlThird Party Advisory
→
http://lists.opensuse.org/opensuse-updates/2017-01/msg00053.htmlThird Party Advisory
→
http://www.openwall.com/lists/oss-security/2016/12/05/21Mailing List · Third Party Advisory
→
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.htmlThird Party Advisory
→
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.htmlThird Party Advisory
→
http://www.securityfocus.com/bid/95131Broken Link
→
http://www.securitytracker.com/id/1039427Broken Link
→
https://access.redhat.com/errata/RHSA-2017:1220Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2017:1221Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2017:1222Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2017:2999Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2017:3046Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2017:3047Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2017:3453Third Party Advisory
Quick Facts
CVE IDCVE-2016-9840
CVSS Score8.8 / 10
SeverityHIGH
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected9 vendor(s)
PublishedMay 23, 2017
Related CVEs (NVD-CWE-noinfo)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2016-9840 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.