CVE-2016-7568

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-14. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 5%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

Integer overflow in the gdImageWebpCtx function in gd_webp.c in the GD Graphics Library (aka libgd) through 2.2.3, as used in PHP through 7.0.11, allows remote attackers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact via crafted imagewebp and imagedestroy calls.

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
91.5%
KEV
Not listed

Published

September 28, 2016

Last Modified

May 6, 2026

Advisory Details (7)

Auto-updated May 8, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

PHP :: Sec Bug #73003 :: Integer Overflow in gdImageWebpCtx of gd_webp.c

https://bugs.php.net/bug.php?id=73003
generic
http://www.securityfocus.com/bid/93184
generic

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

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

GD: Multiple vulnerabilities (GLSA 201612-09) — Gentoo security

https://security.gentoo.org/glsa/201612-09
generic

Merge branch 'PHP-5.6' into PHP-7.0 · php/php-src@c18263e · GitHub

https://github.com/php/php-src/commit/c18263e0e0769faee96a5d0ee04b750c442783c6
generic🟡 PoC Available

CVE-2016-7568 Integer Overflow in gdImageWebpCtx · Issue #308 · libgd/libgd · GitHub

https://github.com/libgd/libgd/issues/308
generic

Merge branch 'pull-request/296' · libgd/libgd@40bec0f · GitHub

https://github.com/libgd/libgd/commit/40bec0f38f50e8510f5bb71a82f516d46facde03

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.

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 14× in last 7d / 41× 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 115 total refreshes for this CVE.

  1. 2026-07-24 14:13 UTCEPSS rescore
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  3. 2026-07-23 01:24 UTCEG score recompute
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  69. 2026-05-20 10:58 UTCVendor advisory
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  73. 2026-05-20 02:28 UTCVendor advisory
  74. 2026-05-20 02:28 UTCGHSA enrichment
  75. 2026-05-19 22:14 UTCVendor advisory

Frequently asked(5)

What is CVE-2016-7568?
CVE-2016-7568 is a critical vulnerability published on September 28, 2016. Integer overflow in the gdImageWebpCtx function in gd_webp.c in the GD Graphics Library (aka libgd) through 2.2.3, as used in PHP through 7.0.11, allows remote attackers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact via crafted imagewebp and…
When was CVE-2016-7568 disclosed?
CVE-2016-7568 was first published in the National Vulnerability Database on September 28, 2016, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-7568 actively exploited?
CVE-2016-7568 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 91.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2016-7568?
CVE-2016-7568 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2016-7568?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-7568, 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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