CVE-2020-7065

php: Using mb_strtolower() function with UTF-32LE encoding leads to potential code execution

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Severity

Moderate

Red Hat Product Security

8.8

CVSS 3.1

Review impact separately from score.

Published · April 1, 2020

Updated · June 28, 2026

Description

A vulnerability was found in PHP while using the mb_strtolower() function with UTF-32LE encoding, where certain invalid strings cause PHP to overwrite the stack-allocated buffer. This flaw leads to memory corruption, crashes, and potential code execution.

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 3.1 · 8.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE-805 · Buffer Access with Incorrect Length Value