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    CVE-2016-5766

    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.

    Published:Jun 23, 2016
    Last Modified:Apr 12, 2025
    EPS:Aug 7, 2016
    EPSS Score:0.04805
    CVSS Score:8.8

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Freebsd
    Product
    Freebsd
    Vendor
    Libgd
    Product
    Libgd
    Vendor
    Php
    Product
    Php
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Openshift
    Vendor
    Redhat
    Product
    Rhel Software Collections

    Exploits

    http://github.com/php/php-src/commit/7722455726bec8c53458a32851d2a87982cf0eac?w=1https://bugs.php.net/bug.php?id=72339http://github.com/php/php-src/commit/7722455726bec8c53458a32851d2a87982cf0eac?w=1https://bugs.php.net/bug.php?id=72339

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-92 Forced Integer Overflow

    Related CVEs

    CVE-2026-77118 (CVSS 8.4) — A heap out-of-bounds write exists in the Photo CD (PCD) decoder of GraphicsMagick. In DecodeImage() (coders/pc…
    CVE-2026-56968 (CVSS 3.7) — GNU SASL before 2.2.4 lacks sanitization of a short challenge in _gsasl_ntlm_client_step in the NTLM client, w…
    CVE-2026-49975 (CVSS 7.5) — Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's mod_http leads to denial of …
    CVE-2026-9256 (CVSS 9.2) — NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_rewrite_module module. This vulnerabilit…
    CVE-2026-31431 (CVSS 7.8) — In the Linux kernel, the following vulnerability has been resolved: crypto: algif_aead - Revert to operating …
    CVE-2026-34757 (CVSS 5.1) — LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network …
    CVE-2026-4775 (CVSS 7.8) — A flaw was found in the libtiff library. A remote attacker could exploit a signed integer overflow vulnerabili…
    CVE-2025-63261 (CVSS 7.8) — AWStats 8.0 is vulnerable to Command Injection via the open function…
    CVE-2026-3497 (CVSS 6.9) — Vulnerability in the OpenSSH GSSAPI delta included in various Linux distributions. This vulnerability affects …
    CVE-2026-1940 (CVSS 5.1) — An incomplete fix for CVE-2024-47778 allows an out-of-bounds read in gst_wavparse_adtl_chunk() function. The p…

    References

    http://github.com/php/php-src/commit/7722455726bec8c53458a32851d2a87982cf0eac?w=1
    http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00004.html
    http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00025.html
    http://lists.opensuse.org/opensuse-updates/2016-08/msg00003.html
    http://php.net/ChangeLog-5.php
    http://php.net/ChangeLog-7.php
    http://rhn.redhat.com/errata/RHSA-2016-2598.html
    http://rhn.redhat.com/errata/RHSA-2016-2750.html
    http://www.debian.org/security/2016/dsa-3619
    http://www.openwall.com/lists/oss-security/2016/06/23/4
    http://www.ubuntu.com/usn/USN-3030-1
    https://bugs.php.net/bug.php?id=72339
    https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731
    https://libgd.github.io/release-2.2.3.html
    https://security.gentoo.org/glsa/201612-09
    http://github.com/php/php-src/commit/7722455726bec8c53458a32851d2a87982cf0eac?w=1
    http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00004.html
    http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00025.html
    http://lists.opensuse.org/opensuse-updates/2016-08/msg00003.html
    http://php.net/ChangeLog-5.php
    http://php.net/ChangeLog-7.php
    http://rhn.redhat.com/errata/RHSA-2016-2598.html
    http://rhn.redhat.com/errata/RHSA-2016-2750.html
    http://www.debian.org/security/2016/dsa-3619
    http://www.openwall.com/lists/oss-security/2016/06/23/4
    http://www.ubuntu.com/usn/USN-3030-1
    https://bugs.php.net/bug.php?id=72339
    https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731
    https://libgd.github.io/release-2.2.3.html
    https://security.gentoo.org/glsa/201612-09

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High