CVE-2016-5766

high
Published 2016-08-07 · Modified 2026-05-06
CVSS v3
8.8
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v2
6.8
VIR risk
8.8

Description

Integer overflow in the _gd2GetHeader function in gd_gd2.c in the GD Graphics Library (aka libgd) before 2.2.3, as used in PHP before 5.5.37, 5.6.x before 5.6.23, and 7.x before 7.0.8, allows remote attackers to cause a denial of service (heap-based buffer overflow and application crash) or possibly have unspecified other impact via crafted chunk dimensions in an image.

Predictions

Exploit likelihood
92%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2016-5766

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2016-5766.html

vendor Authored 2026-05-27

Vendor advisory: cve@mitre.org — https://libgd.github.io/release-2.2.3.html

vendor Authored 2026-05-27

Vendor advisory: cve@mitre.org — https://bugs.php.net/bug.php?id=72339

vendor Authored 2026-05-27

Vendor advisory: cve@mitre.org — http://www.openwall.com/lists/oss-security/2016/06/23/4

vendor Authored 2026-05-27

Vendor advisory: cve@mitre.org — http://php.net/ChangeLog-7.php

vendor Authored 2026-05-27

Vendor advisory: cve@mitre.org — http://php.net/ChangeLog-5.php

vendor Authored 2026-05-27

Vendor advisory: cve@mitre.org — http://github.com/php/php-src/commit/7722455726bec8c53458a32851d2a87982cf0eac?w=1

OS impact

OSVersionStatusFixed in
suse slesaffected
debian debianbookwormfixed2.2.2-29-g3c2b605-1
debian debianbullseyefixed2.2.2-29-g3c2b605-1
debian debianforkyfixed2.2.2-29-g3c2b605-1
debian debiansidfixed2.2.2-29-g3c2b605-1
debian debiantrixiefixed2.2.2-29-g3c2b605-1
debian debian8.0affected
freebsd freebsd8.3affected
freebsd freebsd8.0affected
freebsd freebsd10.0affected
freebsd freebsd10.1affected
freebsd freebsd8.4affected
freebsd freebsd9.2affected
freebsd freebsd8.2affected
freebsd freebsd8.1affected
freebsd freebsd9.0affected
freebsd freebsd10.2affected
freebsd freebsd9.3affected
freebsd freebsd10.3affected
freebsd freebsd9.1affected
redhat rhel6.0affected
redhat rhel5affected
redhat rhel7.0affected
fedora fedora23affected
fedora fedora24affected
fedora fedora22affected

Application impact

VendorProductVersionsFixed
libgdlibgd2.2.2
php phpphp{"endIncluding":"5.5.36"}
php phpphp5.6.0
php phpphp5.6.1
php phpphp5.6.2
php phpphp5.6.3
php phpphp5.6.4
php phpphp5.6.5
php phpphp5.6.6
php phpphp5.6.7
php phpphp5.6.8
php phpphp5.6.9
php phpphp5.6.10
php phpphp5.6.11
php phpphp5.6.12
php phpphp5.6.13
php phpphp5.6.14
php phpphp5.6.15
php phpphp5.6.16
php phpphp5.6.17
php phpphp5.6.18
php phpphp5.6.19
php phpphp5.6.20
php phpphp5.6.21
php phpphp5.6.22
php phpphp7.0.0
php phpphp7.0.1
php phpphp7.0.2
php phpphp7.0.3
php phpphp7.0.4
php phpphp7.0.5
php phpphp7.0.6
php phpphp7.0.7

References

CWEs

CWE-190

Verify integrity in audit chain (admin only). AS-IS.