HOME VULNERABILITIESCVE-2016-5116

CRITICAL

CVE-2016-5116

CWE-119Published: August 7, 2016· Updated: Jun 17, 2026

9.1

CVSS v3.1

Official Description

gd_xbm.c in the GD Graphics Library (aka libgd) before 2.2.0, as used in certain custom PHP 5.5.x configurations, allows context-dependent attackers to obtain sensitive information from process memory or cause a denial of service (stack-based buffer under-read and application crash) via a long name.

Technical Analysis

CVE-2016-5116 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), availability disruption (denial of service), with a CVSS base score of 9.1.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityHigh

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

Affected Vendors & Products

Debian1 product(s)

debian linux

libgd1 product(s)

libgd

openSUSE1 product(s)

leap

PHP1 product(s)

php

Source: NVD CPE · 37 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/libgd/libgd/commit/4dc1a2d7931017d3625f2d7cff70a17ce58b53b4

PATCHhttps://github.com/libgd/libgd/commit/4dc1a2d7931017d3625f2d7cff70a17ce58b53b4

ADVISORYhttp://lists.opensuse.org/opensuse-updates/2016-09/msg00078.html

ADVISORYhttp://www.debian.org/security/2016/dsa-3619

ADVISORYhttps://github.com/libgd/libgd/issues/211

ADVISORYhttp://lists.opensuse.org/opensuse-updates/2016-09/msg00078.html

ADVISORYhttp://www.debian.org/security/2016/dsa-3619

ADVISORYhttps://github.com/libgd/libgd/issues/211

All References (12)

→

http://lists.opensuse.org/opensuse-updates/2016-09/msg00078.htmlThird Party Advisory

→

http://www.debian.org/security/2016/dsa-3619Third Party Advisory

→

http://www.openwall.com/lists/oss-security/2016/05/29/5Mailing List

→

http://www.ubuntu.com/usn/USN-3030-1

→

https://github.com/libgd/libgd/commit/4dc1a2d7931017d3625f2d7cff70a17ce58b53b4Issue Tracking · Patch · Third Party Advisory

→

https://github.com/libgd/libgd/issues/211Issue Tracking · Third Party Advisory

→

http://lists.opensuse.org/opensuse-updates/2016-09/msg00078.htmlThird Party Advisory

→

http://www.debian.org/security/2016/dsa-3619Third Party Advisory

→

http://www.openwall.com/lists/oss-security/2016/05/29/5Mailing List

→

http://www.ubuntu.com/usn/USN-3030-1

→

https://github.com/libgd/libgd/commit/4dc1a2d7931017d3625f2d7cff70a17ce58b53b4Issue Tracking · Patch · Third Party Advisory

→

https://github.com/libgd/libgd/issues/211Issue Tracking · Third Party Advisory

Quick Facts

CVE IDCVE-2016-5116

CVSS Score9.1 / 10

SeverityCRITICAL

WeaknessCWE-119

CISA KEVNo

Affected4 vendor(s)

PublishedAug 7, 2016

Related CVEs (CWE-119)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2016-5116 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.

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