CVE-2016-9840

Name: CVE-2016-9840
Creator: NVD / NIST
Published: 2017-05-23T04:29:01.667+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 4.79%

Last modified Jun 17, 2026

CVE-2016-9840 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. inftrees.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact by leveraging improper pointer arithmetic.. EPSS estimates a 4.79% chance of exploitation in the next 30 days.

Description

inftrees.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact by leveraging improper pointer arithmetic.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

4.79%

90.8th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions	Update
Boost	Boost	< 1.78.0	—
Zlib	Zlib	>= 1.2.0.6, < 1.2.9	—
Opensuse	Leap	42.1	—
Opensuse	Leap	42.2	—
Opensuse	Opensuse	13.2	—
Debian	Debian Linux	8.0	—
Canonical	Ubuntu Linux	16.04	—
Canonical	Ubuntu Linux	18.04	—
Oracle	Database Server	18c	—
Oracle	Jdk	1.6.0	Update161
Oracle	Jdk	1.7.0	Update151
Oracle	Jdk	1.8.0	Update144
Oracle	Jre	1.6.0	Update161
Oracle	Jre	1.7.0	Update151
Oracle	Jre	1.8.0	Update144
Oracle	Mysql	>= 5.5.0, <= 5.5.61	—
Oracle	Mysql	>= 5.6.0, <= 5.6.41	—
Oracle	Mysql	>= 5.7.0, <= 5.7.23	—
Oracle	Mysql	>= 8.0.0, <= 8.0.12	—
Redhat	Satellite	5.8	—
Redhat	Enterprise Linux Desktop	6.0	—
Redhat	Enterprise Linux Desktop	7.0	—
Redhat	Enterprise Linux Eus	7.4	—
Redhat	Enterprise Linux Eus	7.5	—
Redhat	Enterprise Linux Server	6.0	—
Redhat	Enterprise Linux Server	7.0	—
Redhat	Enterprise Linux Workstation	6.0	—
Redhat	Enterprise Linux Workstation	7.0	—
Apple	Iphone Os	< 11	—
Apple	Mac Os X	>= 10.0.0, < 10.13.0	—
Apple	Tvos	< 11.0	—
Apple	Watchos	< 4	—
Nodejs	Node.Js	>= 4.0.0, <= 4.1.2	—
Nodejs	Node.Js	>= 4.2.0, < 4.8.2	—
Nodejs	Node.Js	>= 6.0.0, <= 6.8.1	—
Nodejs	Node.Js	>= 6.9.0, < 6.10.2	—
Nodejs	Node.Js	>= 7.0.0, < 7.6.0	—

References

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
https://bugzilla.redhat.com/show_bug.cgi?id=1402345Issue Tracking, Third Party Advisory
https://github.com/madler/zlib/commit/6a043145ca6e9c55184013841a67b2fef87e44c0Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/03/msg00027.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/01/msg00030.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/201701-56Third Party Advisory
https://security.gentoo.org/glsa/202007-54Third Party Advisory
https://support.apple.com/HT208112Third Party Advisory
https://support.apple.com/HT208113Third Party Advisory
https://support.apple.com/HT208115Third Party Advisory
https://support.apple.com/HT208144Third Party Advisory
https://usn.ubuntu.com/4246-1/Third Party Advisory
https://usn.ubuntu.com/4292-1/Third Party Advisory
https://wiki.mozilla.org/MOSS/Secure_Open_Source/Completed#zlibThird Party Advisory
https://wiki.mozilla.org/images/0/09/Zlib-report.pdfBroken Link
https://www.oracle.com/security-alerts/cpujul2020.htmlThird Party Advisory
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
https://bugzilla.redhat.com/show_bug.cgi?id=1402345Issue Tracking, Third Party Advisory
https://github.com/madler/zlib/commit/6a043145ca6e9c55184013841a67b2fef87e44c0Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/03/msg00027.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/01/msg00030.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/201701-56Third Party Advisory
https://security.gentoo.org/glsa/202007-54Third Party Advisory
https://support.apple.com/HT208112Third Party Advisory
https://support.apple.com/HT208113Third Party Advisory
https://support.apple.com/HT208115Third Party Advisory
https://support.apple.com/HT208144Third Party Advisory
https://usn.ubuntu.com/4246-1/Third Party Advisory
https://usn.ubuntu.com/4292-1/Third Party Advisory
https://wiki.mozilla.org/MOSS/Secure_Open_Source/Completed#zlibThird Party Advisory
https://wiki.mozilla.org/images/0/09/Zlib-report.pdfBroken Link
https://www.oracle.com/security-alerts/cpujul2020.htmlThird Party Advisory

Timeline

Published: May 23, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-9840?

inftrees.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact by leveraging improper pointer arithmetic.

How severe is CVE-2016-9840?

CVE-2016-9840 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 4.79% probability of exploitation in the next 30 days.

How do I fix CVE-2016-9840?

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-2016-9840?

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

Scan your code now

Source: NVD / NIST