🛡️ UBUNTU-CVE-2021-21708
⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2021-12-31
Updated 2026-06-08
Modified 2026-04-22
Fix URL N/A

Affected Packages

Software From version Fixed in
php7.4 7.4.3-4ubuntu2.9
php8.1 8.1.2-1ubuntu1

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