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CVE-2016-6911

21
FAUCET Score

CVE-2016-6911 describes an out-of-bounds read vulnerability in the dynamicGetbuf function of the GD Graphics Library (libgd) prior to version 2.2.4. This flaw allows remote attackers to trigger a denial of service by processing a specially crafted TIFF image. Rated Medium (CVSS 5.5), exploitation requires user interaction (UI:R) and local access (AV:L), leading to high availability impact (A:H) but no confidentiality or integrity compromise. There is no evidence of active exploitation, public exploit code, or significant community discussion, indicating a low current threat landscape.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.2.3CPE matchmatch criteria
cpe:2.3:a:libgd:libgd:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.76%
Probability of exploitation in next 30 days
EPSS Percentile
75.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0176 is in the 86th percentile among its peer group of 5,758 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (14)

github_advisorypatch availablevia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: gd
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: php
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: php53
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: gd
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: php
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: gd
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: php
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Enterprise 2Fixed in: gd
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Enterprise 2Fixed in: php
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: php54-php
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: php55-php
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-php56-php
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-php70-php

Vendor Advisories (1)

redhatCVE-2016-6911Moderate

php: Missing check for OOB read in dynamicGetbuf()

Oct 15, 2016

References

github.com / libgd/libgd/blob/gd-2.2.4/CHANGELOG.md
Issue TrackingPatchRelease NotesThird Party Advisory
github.com / libgd/libgd/commit/4859d69e07504d4b0a4bdf9bcb4d9e3769ca35ae
Issue TrackingPatchThird Party Advisory
github.com / libgd/libgd/pull/353
Issue TrackingPatchThird Party Advisory
debian.org / security/2016/dsa-3693
securityfocus.com / bid/95840