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CVE-2016-10166

35
FAUCET Score

CVE-2016-10166 describes an integer underflow vulnerability in the _gdContributionsAlloc function within the GD Graphics Library (libgd) versions prior to 2.2.4. This critical vulnerability (CVSS 9.8) allows remote attackers to achieve high impact on confidentiality, integrity, and availability without requiring user interaction or authentication. Despite its severity, there is no known active exploitation, publicly available exploit code, or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.2.3CPE matchmatch criteria
cpe:2.3:a:libgd:libgd:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
10.69%
Probability of exploitation in next 30 days
EPSS Percentile
95.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.1069 is in the 91st percentile among its peer group of 36,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (11)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-php71-php-0:7.1.30-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-php72-php-0:7.2.24-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSFixed in: rh-php71-php-0:7.1.30-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSFixed in: rh-php71-php-0:7.1.30-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: rh-php71-php-0:7.1.30-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: rh-php72-php-0:7.2.24-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUSFixed in: rh-php72-php-0:7.2.24-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSFixed in: rh-php72-php-0:7.2.24-1.el7
View patch
redhatno patchvia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-php70-php
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-php56-php

Vendor Advisories (1)

redhatCVE-2016-10166Moderate

gd: Unsigned integer underflow _gdContributionsAlloc()

Aug 6, 2016

References

libgd.github.io / release-2.2.4.html
Release NotesVendor Advisory
access.redhat.com / errata/RHSA-2019:2519
access.redhat.com / errata/RHSA-2019:3299
github.com / libgd/libgd/commit/60bfb401ad5a4a8ae995dcd36372fe15c71e1a35
Issue TrackingPatchThird Party Advisory
debian.org / security/2017/dsa-3777
openwall.com / lists/oss-security/2017/01/26/1
Mailing ListPatchThird Party Advisory
openwall.com / lists/oss-security/2017/01/28/6
Mailing ListPatchThird Party Advisory
securityfocus.com / bid/95869
Third Party AdvisoryVDB Entry