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CVE-2021-21708 Critical

公開: 2022-02-27 / 更新: 2026-06-17 / CVSS: 9.8 / 出典: nvd
製品: PHP

外部リンク: NVD

説明 (原文)

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.