CVE-2021-21708
- Source
- https://cve.org/CVERecord?id=CVE-2021-21708
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-21708.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2021-21708
- Aliases
- Downstream
- Related
- Published
- 2022-02-27T08:15:06.817Z
- Modified
- 2026-04-11T19:42:34.015488Z
- Severity
-
- 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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 FILTERVALIDATEFLOAT 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 FILTERVALIDATEFLOAT with min/max limits.
- References
Affected packages
Git / github.com/php/php-src
Affected ranges
- Type
- GIT
- Repo
- https://github.com/php/php-src
- Events
- Database specific
{ "source": "CPE_FIELD", "extracted_events": [ { "introduced": "7.4.0" }, { "fixed": "7.4.28" }, { "introduced": "8.0.0" }, { "fixed": "8.0.16" }, { "introduced": "8.1.0" }, { "fixed": "8.1.3" } ], "cpe": "cpe:2.3:a:php:php:*:*:*:*:*:*:*:*" }