VDB
DEBIAN-CVE-2021-21708
DEBIAN-CVE-2021-21708
PUBLISHED
CVSS 9.800000190734863 CRITICAL
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.
Risk Scores
CVSS 3.1
9.800000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:11 | php7.4 | 0, 7.4.21-1, 7.4.25-1 |
Timeline
- Feb 27, 2022 CVE Published
- Apr 28, 2026 CVE Updated