CVE-2016-7127

Status: ModifiedCritical (9.8)—
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.
CVSS

Version: 3.0
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base score: 9.8
Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 6.84%
Percentile among all scored CVEs: 94
Score date: 10/18/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
Affected technologies (1)

PHP — PHP
CWEs

CWE-787
References

Raw JSON (NVD)

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      "value": "La función imagetruecolortopalette en ext/gd/gd.c en PHP en versiones anteriores a 5.6.25 y 7.x en versiones anteriores a 7.0.10 no valida adecuadamente los valores de gama, lo que permite a atacantes remotos provocar una denegación de servicio (escritura fuera de límites) o tener otro posible impacto no especificado proporcionando diferentes signos para el segundo y tercer argumento."
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