01 Record

CVE-2016-9842

The inflateMark function in inflate.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact via vectors involving left shifts of negative integers.

HighPUBLISHEDCNA: microfocus

CNA base score8.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

View raw JSON

02 Description

The inflateMark function in inflate.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact via vectors involving left shifts of negative integers.

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

5.20% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 91.7% of scored records. A rank, not a probability.

NVD base score

8.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-07-14.

Red Hat severity

Low. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2017-05-23 03:56Z9 YR AGO

Last updated

2026-07-14 11:44Z1 MO AGO

Reserved

2016-12-05

Assigning CNA

microfocus

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

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

Weaknesses

CWE-1335Incorrect Bitwise Shift of IntegerBase

Data version

5.2

Document digest

5c0f7e30520f810382e4ff206841ee0d6f7d48778858cafa433a714196a0072d

05 Affected products

VendorProductVersionsPlatforms

appleiphone_osNot specified—

applemac_os_xNot specified—

appletvosNot specified—

applewatchosNot specified—

canonicalubuntu_linuxNot specified—

debiandebian_linuxNot specified—

nodejsnode.jsNot specified—

opensuseleapNot specified—

opensuseopensuseNot specified—

oracledatabase_serverNot specified—

oraclejdkNot specified—

oraclejreNot specified—

oraclemysqlNot specified—

redhatenterprise_linuxNot specified—

redhatenterprise_linux_desktopNot specified—

redhatenterprise_linux_eusNot specified—

redhatenterprise_linux_serverNot specified—

redhatenterprise_linux_workstationNot specified—

redhatjboss_enterprise_application_platformNot specified—

redhatjboss_enterprise_web_serverNot specified—

redhatnetwork_satelliteNot specified—

redhatrhel_extrasNot specified—

redhatrhel_extras_oracle_javaNot specified—

redhatsatelliteNot specified—

zlibzlibNot specified—

06 References

access.redhat.comRHSA-2017:1221https://access.redhat.com/errata/RHSA-2017:1221vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2017:1220https://access.redhat.com/errata/RHSA-2017:1220vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2017:3047https://access.redhat.com/errata/RHSA-2017:3047vendor-advisoryx_refsource_REDHAT
www.openwall.com[oss-security] 20161205 Re: CVE Request: zlib security issues found during audithttp://www.openwall.com/lists/oss-security/2016/12/05/21mailing-listx_refsource_MLIST
www.securityfocus.com95131http://www.securityfocus.com/bid/95131vdb-entryx_refsource_BID
access.redhat.comRHSA-2017:3046https://access.redhat.com/errata/RHSA-2017:3046vendor-advisoryx_refsource_REDHAT
lists.opensuse.orgopenSUSE-SU-2017:0077http://lists.opensuse.org/opensuse-updates/2017-01/msg00050.htmlvendor-advisoryx_refsource_SUSE
security.gentoo.orgGLSA-201701-56https://security.gentoo.org/glsa/201701-56vendor-advisoryx_refsource_GENTOO
www.securitytracker.com1039427http://www.securitytracker.com/id/1039427vdb-entryx_refsource_SECTRACK
access.redhat.comRHSA-2017:1222https://access.redhat.com/errata/RHSA-2017:1222vendor-advisoryx_refsource_REDHAT
lists.opensuse.orgopenSUSE-SU-2017:0080http://lists.opensuse.org/opensuse-updates/2017-01/msg00053.htmlvendor-advisoryx_refsource_SUSE
access.redhat.comRHSA-2017:3453https://access.redhat.com/errata/RHSA-2017:3453vendor-advisoryx_refsource_REDHAT
lists.opensuse.orgopenSUSE-SU-2016:3202http://lists.opensuse.org/opensuse-updates/2016-12/msg00127.htmlvendor-advisoryx_refsource_SUSE
access.redhat.comRHSA-2017:2999https://access.redhat.com/errata/RHSA-2017:2999vendor-advisoryx_refsource_REDHAT
lists.debian.org[debian-lts-announce] 20190324 [SECURITY] [DLA 1725-1] rsync security updatehttps://lists.debian.org/debian-lts-announce/2019/03/msg00027.htmlmailing-listx_refsource_MLIST
usn.ubuntu.comUSN-4246-1https://usn.ubuntu.com/4246-1/vendor-advisoryx_refsource_UBUNTU
lists.debian.org[debian-lts-announce] 20200129 [SECURITY] [DLA 2085-1] zlib security updatehttps://lists.debian.org/debian-lts-announce/2020/01/msg00030.htmlmailing-listx_refsource_MLIST
usn.ubuntu.comUSN-4292-1https://usn.ubuntu.com/4292-1/vendor-advisoryx_refsource_UBUNTU
www.oracle.comhttp://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.htmlx_refsource_CONFIRM
www.oracle.comhttps://www.oracle.com/security-alerts/cpujul2020.htmlx_refsource_MISC
www.oracle.comhttp://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.htmlx_refsource_CONFIRM
support.apple.comhttps://support.apple.com/HT208144x_refsource_CONFIRM
wiki.mozilla.orghttps://wiki.mozilla.org/MOSS/Secure_Open_Source/Completed#zlibx_refsource_MISC
support.apple.comhttps://support.apple.com/HT208113x_refsource_CONFIRM
support.apple.comhttps://support.apple.com/HT208112x_refsource_CONFIRM
support.apple.comhttps://support.apple.com/HT208115x_refsource_CONFIRM
wiki.mozilla.orghttps://wiki.mozilla.org/images/0/09/Zlib-report.pdfx_refsource_MISC
bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1402348x_refsource_CONFIRM
github.comhttps://github.com/madler/zlib/commit/e54e1299404101a5a9d0cf5e45512b543967f958x_refsource_CONFIRM
security.gentoo.orgGLSA-202007-54https://security.gentoo.org/glsa/202007-54vendor-advisoryx_refsource_GENTOO
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-470355.html

01 Record index

CVE-2016-9842

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2016-9842

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References