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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (5.20%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 5.20% probability · 92th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-1335
- Affected
- zlib/zlib · opensuse/leap · opensuse/opensuse · debian/debian linux · canonical/ubuntu linux · oracle/database server · oracle/jdk · oracle/jre · oracle/mysql · redhat/satellite · redhat/enterprise linux desktop · redhat/enterprise linux eus · redhat/enterprise linux server · redhat/enterprise linux workstation · apple/iphone os · apple/mac os x · apple/tvos · apple/watchos · nodejs/node.js
- Source
- security@opentext.com
EPSS 5.2% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lists.opensuse.org/opensuse-updates/2016-12/msg00127.htmlBroken Link
- http://lists.opensuse.org/opensuse-updates/2017-01/msg00050.htmlBroken Link
- http://lists.opensuse.org/opensuse-updates/2017-01/msg00053.htmlBroken Link
- http://www.openwall.com/lists/oss-security/2016/12/05/21Mailing List, Patch
- 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, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039427Broken Link, Third Party Advisory, VDB Entry
- 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=1402348Issue Tracking, Patch
- https://github.com/madler/zlib/commit/e54e1299404101a5a9d0cf5e45512b543967f958Patch
- 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.pdfThird Party Advisory
- https://www.oracle.com/security-alerts/cpujul2020.htmlThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.