CVE-2016-10166

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-17. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this weekElevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 11%CVSS: 9.8Exploit: Elevated riskExposed: 0

A fix is available — apply it.

Integer underflow in the _gdContributionsAlloc function in gd_interpolation.c in the GD Graphics Library (aka libgd) before 2.2.4 allows remote attackers to have unspecified impact via vectors related to decrementing the u variable.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
65(Track*)
EG Risk 65/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation40% × 40%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
11%
EPSS %ILE
95%
KEV
Not listed

Published

March 15, 2017

Last Modified

June 17, 2026

Advisory Details (8)

Auto-updated Jul 27, 2026
Patch available. Sources: redhat, github_commit.
generic Patch Available

[SECURITY] [DSA 3777-1] libgd2 security update

http://www.debian.org/security/2017/dsa-3777
generic

LibGD 2.2.4 release

http://libgd.github.io/release-2.2.4.html
github_commit Patch Available

commit 60bfb401ad5a (libgd/libgd)

Patch available: libgd/libgd gd-2.3.0 (contains commit 60bfb401ad5a)

https://github.com/libgd/libgd/commit/60bfb401ad5a4a8ae995dcd36372fe15c71e1a35
redhat Patch Available
https://access.redhat.com/errata/RHSA-2019:3299
redhat Patch Available
https://access.redhat.com/errata/RHSA-2019:2519
generic
http://www.securityfocus.com/bid/95869
generic

oss-security - Re: CVE Requests: libgd: potential unsigned onderflow, denial-of-service in gdImageCreateFromGd2Ctx and signed overflow in gd_io.c

http://www.openwall.com/lists/oss-security/2017/01/28/6
generic

oss-security - CVE Requests: libgd: potential unsigned onderflow, denial-of-service in gdImageCreateFromGd2Ctx and signed overflow in gd_io.c

http://www.openwall.com/lists/oss-security/2017/01/26/1

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibgd3 (2.2.1-1ubuntu3.3) @ yakkety2026-05-20ubuntu
redhatrh-php72-php-0:7.2.24-1.el72019-11-01redhat
redhatrh-php71-php-0:7.1.30-1.el72019-08-19redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(3)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 11× in last 7d / 38× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 114 total refreshes for this CVE.

  1. 2026-07-26 14:50 UTCEPSS rescore
  2. 2026-07-25 15:00 UTCOSV refresh
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  6. 2026-07-23 01:21 UTCEG score recompute
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  25. 2026-06-19 21:52 UTCOSV refresh
  26. 2026-06-19 19:23 UTCEPSS rescore
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  70. 2026-05-20 10:11 UTCVendor advisory
  71. 2026-05-20 10:11 UTCGHSA enrichment
  72. 2026-05-20 05:53 UTCVendor advisory
  73. 2026-05-20 05:53 UTCGHSA enrichment
  74. 2026-05-20 01:35 UTCVendor advisory
  75. 2026-05-20 01:35 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2016-10166?
CVE-2016-10166 is a critical vulnerability published on March 15, 2017. Integer underflow in the gdContributionsAlloc function in gdinterpolation.c in the GD Graphics Library (aka libgd) before 2.2.4 allows remote attackers to have unspecified impact via vectors related to decrementing the u variable.
When was CVE-2016-10166 disclosed?
CVE-2016-10166 was first published in the National Vulnerability Database on March 15, 2017, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-10166 actively exploited?
CVE-2016-10166 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 11% probability of exploitation in the next 30 days, which ranks it in the top 4.7% of all scored CVEs.
What is the CVSS score of CVE-2016-10166?
CVE-2016-10166 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2016-10166?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-10166, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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