high
8.8
Advisory Published
CVE Published
Updated

CVE-2016-9840

First published: Wed Dec 07 2016(Updated: )

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

Credit: CVE-2016-9840 CVE-2016-9841 CVE-2016-9842 CVE-2016-9843 CVE-2016-9840 CVE-2016-9841 CVE-2016-9842 CVE-2016-9843 security@opentext.com meissner@suse.de

Affected SoftwareAffected VersionHow to fix
redhat/zlib<1.2.9
1.2.9
debian/rsync
3.2.3-4+deb11u1
3.2.3-4+deb11u3
3.2.7-1
3.2.7-1+deb12u2
3.3.0+ds1-4
debian/zlib
1:1.2.11.dfsg-2+deb11u2
1:1.2.13.dfsg-1
1:1.3.dfsg+really1.3.1-1
tvOS<11
11
macOS High Sierra<10.13
10.13
Apple iOS, iPadOS, and watchOS<11
11
Apple iOS, iPadOS, and watchOS<4
4
zlib>=1.2.0.6<1.2.9
openSUSE=42.1
openSUSE=42.2
openSUSE=13.2
Debian=8.0
Ubuntu=16.04
Ubuntu=18.04
Oracle Database=18c
Oracle JDK 6=1.6.0-update161
Oracle JDK 6=1.7.0-update151
Oracle JDK 6=1.8.0-update144
Oracle Java Runtime Environment (JRE)=1.6.0-update161
Oracle Java Runtime Environment (JRE)=1.7.0-update151
Oracle Java Runtime Environment (JRE)=1.8.0-update144
MySQL>=5.5.0<=5.5.61
MySQL>=5.6.0<=5.6.41
MySQL>=5.7.0<=5.7.23
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
iOS<11
Apple iOS and macOS>=10.0.0<10.13.0
tvOS<11.0
Apple iOS, iPadOS, and watchOS<4
Node.js>=4.0.0<=4.1.2
Node.js>=4.2.0<4.8.2
Node.js>=6.0.0<=6.8.1
Node.js>=6.9.0<6.10.2
Node.js>=7.0.0<7.6.0
F5 BIG-IP and BIG-IQ Centralized Management>=17.1.0<=17.1.2
F5 BIG-IP and BIG-IQ Centralized Management>=16.1.0<=16.1.5
F5 BIG-IP and BIG-IQ Centralized Management>=15.1.0<=15.1.10
F5 BIG-IP and BIG-IQ Centralized Management>=8.2.0<=8.3.0

Remedy

http://www.openwall.com/lists/oss-security/2016/12/05/21

Remedy

http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html

Remedy

http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=1402345

Remedy

https://github.com/madler/zlib/commit/6a043145ca6e9c55184013841a67b2fef87e44c0

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of CVE-2016-9840?

    CVE-2016-9840 has been classified with a severity that could allow attackers to exploit improper pointer arithmetic leading to unspecified impact.

  • How do I fix CVE-2016-9840?

    To fix CVE-2016-9840, update zlib to version 1.2.9 or later, or apply vendor-specific patches as applicable.

  • Which software versions are affected by CVE-2016-9840?

    CVE-2016-9840 affects zlib versions prior to 1.2.9 and several operating systems including older versions of iOS, macOS, and various Linux distributions.

  • Can CVE-2016-9840 be exploited remotely?

    CVE-2016-9840 may allow context-dependent attackers to exploit applications using the vulnerable zlib library, potentially leading to remote attacks.

  • What are the consequences of CVE-2016-9840 exploitation?

    Exploitation of CVE-2016-9840 could result in application crashes or arbitrary code execution due to improper handling of pointers.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2025 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203