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NVD / CVE Program· CNA debian

CVE-2016-6161: The output function in gd_gif_out.c in the GD Graphics Library (aka libgd) allows remote attackers to cause a denial of service…

MediumCVSS 6.5 · v3.0—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 27/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 2.8% (FIRST EPSS); higher than 87% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: gd (Alpine:v3.2) 2.2.1-r2; libgd2 (Debian:12) 2.2.1-1; libgd2 (Debian:7) 2.0.36~rc1~dfsg-6.1+deb7u5.

Low priority for now. Upgrade to gd (Alpine:v3.2) 2.2.1-r2; libgd2 (Debian:12) 2.2.1-1; libgd2 (Debian:7) 2.0.36~rc1~dfsg-6.1+deb7u5 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

The output function in gd_gif_out.c in the GD Graphics Library (aka libgd) allows remote attackers to cause a denial of service (out-of-bounds read) via a crafted image.

Published
Aug 12, 2016
Updated
Jun 16, 2026
EPSS
2.8% · 87th percentile

Report tools

JSON

Action score

27

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 2.8%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
libgdlibgd
debiandebian linux
opensuseleap

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux8.0
  • libgd libgdup to 2.2.2 inclusive
  • opensuse leap42.1

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Alpine:v3.2gdbefore 2.2.1-r22.2.1-r2
Debian:12libgd2before 2.2.1-12.2.1-1
Debian:7libgd2before 2.0.36~rc1~dfsg-6.1+deb7u52.0.36~rc1~dfsg-6.1+deb7u5
Debian:8libgd2before 2.1.0-5+deb8u42.1.0-5+deb8u4
SUSE:Linux Enterprise Desktop 12 SP1gdbefore 2.1.0-12.12.1.0-12.1
SUSE:Linux Enterprise Module for Web and Scripting 12php5before 5.5.14-73.15.5.14-73.1
SUSE:Linux Enterprise Module for Web and Scripting 12php7before 7.0.7-15.17.0.7-15.1
SUSE:Linux Enterprise Software Development Kit 11 SP4gdbefore 2.0.36.RC1-52.22.12.0.36.RC1-52.22.1

Same product

libgd: all records

Other highest-scoring records for the same primary product.

  • CVE-2019-6977gdImageColorMatch in gd_color_match.c in the GD Graphics Library (aka LibGD) 2.2.5, as used in the imagecolormatch function in PHP before 5.
    56Plan
  • CVE-2016-3074Integer signedness error in GD Graphics Library 2.1.1 (aka libgd or libgd2) allows remote attackers to cause a denial of service (crash) or…
    50Plan
  • CVE-2016-10166Integer underflow in the _gdContributionsAlloc function in gd_interpolation.c in the GD Graphics Library (aka libgd) before 2.2.4 allows…
    42Plan

Published before and after this one in the same product

  • ← EarlierCVE-2016-6128Aug 7, 2016 · The gdImageCropThreshold function in gd_crop.c in the GD Graphics Library (aka libgd) before 2.2.3, as used in PHP before 7.0.9, allows…
    32Monitor
  • ← EarlierCVE-2016-6132Aug 12, 2016 · The gdImageCreateFromTgaCtx function in the GD Graphics Library (aka libgd) before 2.2.3 allows remote attackers to cause a denial of…
    27Monitor
  • Later →CVE-2016-6207Aug 12, 2016 · Integer overflow in the _gdContributionsAlloc function in gd_interpolation.c in GD Graphics Library (aka libgd) before 2.2.3 allows remote…
    28Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
alpine:gd2.2.1-r2 · Alpine:v3.2Package registry (OSV)
debian:libgd22.2.1-1 · Debian:12Package registry (OSV)
suse:gd2.0.36.RC1-52.22.1 · SUSE:Linux Enterprise Software Development Kit 11 SP4Package registry (OSV)
suse:php55.5.14-73.1 · SUSE:Linux Enterprise Module for Web and Scripting 12Package registry (OSV)
suse:php77.0.7-15.1 · SUSE:Linux Enterprise Module for Web and Scripting 12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

References

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records