Description
The imagegammacorrect function in ext/gd/gd.c in PHP before 5.6.25 and 7.x before 7.0.10 does not properly validate gamma values, which allows remote attackers to cause a denial of service (out-of-bounds write) or possibly have unspecified other impact by providing different signs for the second and third arguments.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 8 | php5 | 5.6.26+dfsg-0+deb8u1 | DSA-3689-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | php7.0 | 7.0.8-0ubuntu0.16.04.3 | USN-3095-1 |
| Ubuntu 14.04 LTS | php5 | 5.5.9+dfsg-1ubuntu4.20 | USN-3095-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 2 | rh-php56 +2 | 2.3-1.el6 | RHSA-2016:2750 |
| RHEL 2 | rh-php56-php +27 | 5.6.25-1.el6 | RHSA-2016:2750 |
| RHEL 2 | rh-php56-php-pear | 1:1.9.5-4.el6 | RHSA-2016:2750 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | php5 | 5.5.14-73.1 | SUSE-SU-2016:2408-1 |
| SLES 12 SP1 | php7 | 7.0.7-15.1 | SUSE-SU-2016:2460-1 |
| SLES 12 | php5 | 5.5.14-73.1 | SUSE-SU-2016:2408-1 |
| SLES 12 | php7 | 7.0.7-15.1 | SUSE-SU-2016:2460-2, SUSE-SU-2016:2460-1 |
| SLES 11 SP4 | php53 | 5.3.17-84.1 | SUSE-SU-2016:2459-1 |
| SLES 11 SP3 | php53 | 5.3.17-84.1 | SUSE-SU-2016:2459-1 |
| SLES 11 SP2 | php53 | 5.3.17-55.1 | SUSE-SU-2016:2328-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 11 SP4 | php53 | 5.3.17-84.1 | SUSE-SU-2016:2459-1 |
| SUSE OpenStack Cloud 5 | php53 | 5.3.17-84.1 | SUSE-SU-2016:2459-1 |
| SUSE Manager Proxy 2.1 | php53 | 5.3.17-84.1 | SUSE-SU-2016:2459-1 |
| SUSE Manager 2.1 | php53 | 5.3.17-84.1 | SUSE-SU-2016:2459-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | php53 | 5.3.17-84.1 | SUSE-SU-2016:2459-1 |
Advisories 8
- RHSA-2016:2750 Red Hat Security Advisory: rh-php56 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- USN-3095-1 php5, php7.0 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3689-1 php5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:2460-1 Security update for php7 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2328-1 Security update for php53 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2408-1 Security update for php5 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2460-2 Security update for php7 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2459-1 Security update for php53 SUSE / openSUSE Security Updates · Feb 4, 2026
References
- 92757 vdb-entry
- http://www.php.net/ChangeLog-7.php
- https://bugs.php.net/bug.php?id=72730
- GLSA-201611-22 vendor-advisory
- 1036680 vdb-entry
- RHSA-2016:2750 vendor-advisory
- http://www.php.net/ChangeLog-5.php
- https://www.tenable.com/security/tns-2016-19
- [oss-security] 20160902 Re: CVE assignment for PHP 5.6.25 and 7.0.10 - and libcurl mailing-list
- https://github.com/php/php-src/commit/1bd103df00f49cf4d4ade2cfe3f456ac058a4eae?w=1