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Vulnerability record · CVE-2016-7568 · published 28 September 2016

CVE-2016-7568: Libgd integer overflow vulnerability

Libgd · Libgd

Integer overflow in the gdImageWebpCtx function in gd_webp.c in the GD Graphics Library (aka libgd) through 2.2.3, as used in PHP through 7.0.11, allows remote attackers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact via crafted imagewebp and imagedestroy calls.

9.8 CVSS 3.0 Critical EPSS 5.1% · top 7.9% CWE-190 · Integer overflow
9.8CVSS 3.0 base score, v2 7.5
5.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
14References
17 Jun 2026Last modified by NVD

Description

Integer overflow in the gdImageWebpCtx function in gd_webp.c in the GD Graphics Library (aka libgd) through 2.2.3, as used in PHP through 7.0.11, allows remote attackers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact via crafted imagewebp and imagedestroy calls.

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

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.debian.org/security/2016/dsa-3693 Third Party Advisory
http://www.securityfocus.com/bid/93184 Third Party AdvisoryVDB Entry
https://bugs.php.net/bug.php?id=73003 Issue TrackingVendor Advisory
https://github.com/libgd/libgd/commit/40bec0f38f50e8510f5bb71a82f516d46facde03 Issue TrackingPatchThird Party Advisory
https://github.com/libgd/libgd/issues/308 Issue TrackingPatchThird Party Advisory
https://github.com/php/php-src/commit/c18263e0e0769faee96a5d0ee04b750c442783c6 Issue TrackingPatchThird Party Advisory
https://security.gentoo.org/glsa/201612-09 Third Party Advisory
http://www.debian.org/security/2016/dsa-3693 Third Party Advisory
http://www.securityfocus.com/bid/93184 Third Party AdvisoryVDB Entry
https://bugs.php.net/bug.php?id=73003 Issue TrackingVendor Advisory
https://github.com/libgd/libgd/commit/40bec0f38f50e8510f5bb71a82f516d46facde03 Issue TrackingPatchThird Party Advisory
https://github.com/libgd/libgd/issues/308 Issue TrackingPatchThird Party Advisory
https://github.com/php/php-src/commit/c18263e0e0769faee96a5d0ee04b750c442783c6 Issue TrackingPatchThird Party Advisory
https://security.gentoo.org/glsa/201612-09 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2016-7568), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.