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CVE Database›CVE-2016-4537

CVE-2016-4537

php: bcpowmod accepts negative scale causing heap buffer overflow corrupting _one_ definition

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Severity

Low

Red Hat Product Security

2.6

CVSS 2.0

Review impact separately from score.

Published · April 24, 2016

Updated · June 28, 2026

Description

The bcpowmod function in ext/bcmath/bcmath.c in PHP before 5.5.35, 5.6.x before 5.6.21, and 7.x before 7.0.6 accepts a negative integer for the scale argument, which allows remote attackers to cause a denial of service or possibly have unspecified other impact via a crafted call.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 2.0 · 2.6
AV:N/AC:H/Au:N/C:N/I:P/A:N

CWE-122 · Heap-based Buffer Overflow