CVE-2016-8670

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
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 5%CVSS: 9.8Exploit: None knownExposed: 0

A fix is available — apply it.

Integer signedness error in the dynamicGetbuf function in gd_io_dp.c in the GD Graphics Library (aka libgd) through 2.2.3, as used in PHP before 5.6.28 and 7.x before 7.0.13, allows remote attackers to cause a denial of service (stack-based buffer overflow) or possibly have unspecified other impact via a crafted imagecreatefromstring call.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
51(Track)
EG Risk 51/100SSVC: 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%
Exploitation5% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
5%
EPSS %ILE
92%
KEV
Not listed

Published

January 4, 2017

Last Modified

June 17, 2026

Advisory Details (8)

Auto-updated Sep 22, 2026
Patch available. Sources: github_commit.
generic

oss-security - CVE Request: libgd: Stack Buffer Overflow in GD dynamicGetbuf

http://www.openwall.com/lists/oss-security/2016/10/15/1
generic

[SECURITY] [DSA 3693-1] libgd2 security update

http://www.debian.org/security/2016/dsa-3693
generic

myF5

https://support.f5.com/csp/article/K21336065?utm_source=f5support&amp%3Butm_medium=RSS
github_commit Patch Available

commit 531108719352 (libgd/libgd)

Patch available: libgd/libgd gd-2.3.0 (contains commit 531108719352)

https://github.com/libgd/libgd/commit/53110871935244816bbb9d131da0bccff734bfe9
generic

PHP :: Bug #73280 :: Stack Buffer Overflow in GD dynamicGetbuf

https://bugs.php.net/bug.php?id=73280
generic

CVE-2016-8670 - PSIRT.COM

http://www.securityfocus.com/bid/93594
generic

PHP: PHP 7 ChangeLog

http://www.php.net/ChangeLog-7.php
generic

PHP: PHP 5 ChangeLog

http://www.php.net/ChangeLog-5.php

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibgd3 (2.2.1-1ubuntu3.2) @ yakkety2026-05-20ubuntu

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.

Affected Packages

(6 across 6 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libgd2—2.2.3-87-gd0fec80-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libgd2—2.2.3-87-gd0fec80-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libgd2—2.2.3-87-gd0fec80-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libgd2—2.2.3-87-gd0fec80-1—
Debian:7(1)
PackageVulnerable rangeFixed inDependents
libgd22.0.36~rc1~dfsg-6.1 ... 2.0.36~rc1~dfsg-6.1+deb7u5 (6 versions)2.0.36~rc1~dfsg-6.1+deb7u6—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
libgd22.1.0-5 ... 2.1.0-5+deb8u6 (7 versions)2.1.0-5+deb8u7—

Weakness Classification(1)

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

All Vendor Advisories

(1)

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 5× in last 7d / 23× 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 162 total refreshes for this CVE.

  1. 2026-09-24 13:59 UTCEPSS rescore
  2. 2026-09-23 13:41 UTCEPSS rescore
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  23. 2026-07-25 04:41 UTCOSV refresh
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  26. 2026-07-23 01:24 UTCEG score recompute
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  50. 2026-07-07 23:27 UTCOSV refresh
  51. 2026-07-07 13:42 UTCEPSS rescore
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  74. 2026-06-19 11:25 UTCOSV refresh
  75. 2026-06-18 17:50 UTCEPSS rescore

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2016-8670?
CVE-2016-8670 is a critical vulnerability published on January 4, 2017. Integer signedness error in the dynamicGetbuf function in gdiodp.c in the GD Graphics Library (aka libgd) through 2.2.3, as used in PHP before 5.6.28 and 7.x before 7.0.13, allows remote attackers to cause a denial of service (stack-based buffer overflow) or possibly have unspecified other impact…
When was CVE-2016-8670 disclosed?
CVE-2016-8670 was first published in the National Vulnerability Database on January 4, 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-2016-8670 actively exploited?
CVE-2016-8670 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5% probability of exploitation in the next 30 days, which ranks it in the top 8.4% of all scored CVEs.
What is the CVSS score of CVE-2016-8670?
CVE-2016-8670 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2016-8670?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-8670, 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.

Dependency Blast Radius

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