In PHP versions 7.3.x below 7.3.16 and 7.4.x below 7.4.4, while using mb_strtolower() function with UTF-32LE encoding, certain invalid strings could cause PHP to overwrite stack-allocated buffer. This could lead to memory corruption, crashes and potentially code execution.
{ "cpes": [ "cpe:2.3:a:php:php:*:*:*:*:*:*:*:*" ], "severity": "High" }