CVE & CISA-KEV Catalog

CVE-2016-9842

HIGHEPSS 92th pctl
8.8
CVSS v3
NVD

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.

CWE-1335

How to fix

Remediation Available
rsyncDebian
Fixed in:3.1.3-6CVE-2016-9842
Fixed in:3.1.3-6CVE-2016-9842
Fixed in:3.1.3-6CVE-2016-9842
Fixed in:3.1.3-6CVE-2016-9842
lib32z1Ubuntu
Fixed in:1:1.2.8.dfsg-2ubuntu4.3USN-4246-1
lib64z1Ubuntu
Fixed in:1:1.2.8.dfsg-2ubuntu4.3USN-4246-1
libx32z1Ubuntu
Fixed in:1:1.2.8.dfsg-2ubuntu4.3USN-4246-1
rsyncUbuntu
Fixed in:3.1.1-3ubuntu1.3USN-4292-1
Fixed in:3.1.2-2.1ubuntu1.1USN-4292-1
zlibUbuntu
Fixed in:1:1.2.8.dfsg-2ubuntu4.3USN-4246-1
zlib1gUbuntu
Fixed in:1:1.2.8.dfsg-2ubuntu4.3USN-4246-1
Node.jsWindows application
Affected:7.0.0 7.6.0Fixed in:7.6.0Node.js Foundation
Affected:6.9.0 6.10.2Fixed in:6.10.2Node.js Foundation
Affected:4.2.0 4.8.2Fixed in:4.8.2Node.js Foundation
Node.js (LTS)Windows application
Affected:4.2.0 4.8.2Fixed in:4.8.2Node.js Foundation
Affected:6.9.0 6.10.2Fixed in:6.10.2Node.js Foundation
Affected:7.0.0 7.6.0Fixed in:7.6.0Node.js Foundation

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Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
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

Exploit Intelligence

5.20%probability of exploitation in 30 days
92ndpercentile

High risk: more likely to be exploited than 92% of all known CVEs.

References

Related Vulnerabilities

Other CWE-1335 vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2026-4426Medium6.50.3%-Fix
CVE-2026-5072Medium6.50.3%--
CVE-2023-52810High7.80.3%-Fix
CVE-2025-32029Unscored-0.2%--
CVE-2023-3161Medium5.50.2%-Fix

Common questions

How do I fix CVE-2016-9842?

Published advisories record a fix for 9 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2016-9842 being actively exploited?

Not that we know of. CVE-2016-9842 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 5.2% is the estimated probability that it will be exploited in the next 30 days. That is higher than 92% of all scored CVEs.

How severe is CVE-2016-9842?

CVE-2016-9842 has a CVSS v3 base score of 8.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2016-9842 affect?

Published advisories record a fix for rsync (Debian), lib32z1 (Ubuntu), lib64z1 (Ubuntu), libx32z1 (Ubuntu), and 5 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-14.