CVE-2016-5766
No exploitation reported by the sources we read.
- Published2016-08-07
- WeaknessCWE-190
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
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.
Timeline
dates in UTC- 2016-08-0710:59CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2016-5766?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2016-5766?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 8.3 | = 8.3 | no fix published | NVD |
| 8.0 | = 8.0 | no fix published | NVD |
| 10.0 | = 10.0 | no fix published | NVD |
| 10.1 | = 10.1 | no fix published | NVD |
| 8.4 | = 8.4 | no fix published | NVD |
| 9.2 | = 9.2 | no fix published | NVD |
| 8.2 | = 8.2 | no fix published | NVD |
| 8.1 | = 8.1 | no fix published | NVD |
| 9.0 | = 9.0 | no fix published | NVD |
| 10.2 | = 10.2 | no fix published | NVD |
| 9.3 | = 9.3 | no fix published | NVD |
| 10.3 | = 10.3 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 23.x | = 23 | no fix published | NVD |
| 24.x | = 24 | no fix published | NVD |
| 22.x | = 22 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 6.0 | = 6.0 | no fix published | NVD |
| 5.x | = 5 | no fix published | NVD |
| 7.0 | = 7.0 | no fix published | NVD |
3 more products in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
Advisories and patches
- github.comPatch
- php.netRelease Notes
- php.netRelease Notes
- www.openwall.comRelease Notes
- bugs.php.netPatch · Vendor Advisory
- libgd.github.ioRelease Notes
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- NVDCVSS 3.08.8read 2026-10-23
- NVDCVSS 2.06.8read 2026-10-23
- NVDweakness (CWE)CWE-190read 2026-10-23
- FIRST EPSSEPSS score7.5 %2026-10-22
Technical details
- CVSS v3 Vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Published
- 2016-08-07
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2016-5766?
Is CVE-2016-5766 actively exploited?
What is the CVSS score for CVE-2016-5766?
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