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PHP Use After Free Vulnerability - CVE-2021-21708 - Vulnerability Database
PHP

PHP Use After Free Vulnerability - CVE-2021-21708

Critical
Reference: CVE-2021-21708
NVD Link: https://nvd.nist.gov/vuln/detail/CVE-2021-21708
Title: PHP Use After Free Vulnerability
Overview:

In PHP versions 7.4.x below 7.4.28 8.0.x below 8.0.16 and 8.1.x below 8.1.3 when using filter functions with FILTER_VALIDATE_FLOAT filter and min/max limits if the filter fails there is a possibility to trigger use of allocated memory after free which can result it crashes and potentially in overwrite of other memory chunks and RCE. This issue affects: code that uses FILTER_VALIDATE_FLOAT with min/max limits.