# CVE-2019-11043: Underflow in PHP-FPM can lead to RCE

> CVE-2019-11043: Underflow in PHP-FPM can lead to RCE. CVSS 8.7 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2019-11043
Last updated: 2025-10-21T23:45:28Z

- Published: 2019-10-28 14:19 UTC · Updated: 2025-10-21 23:45 UTC · Assigner: php
- CVSS: 8.7 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
- EPSS: 99.7%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-03-25, federal due date 2022-04-15, ransomware use: Known
- CWE: CWE-120

## Description

In PHP versions 7.1.x below 7.1.33, 7.2.x below 7.2.24 and 7.3.x below 7.3.11 in certain configurations of FPM setup it is possible to cause FPM module to write past allocated buffers into the space reserved for FCGI protocol data, thus opening the possibility of remote code execution.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- PHP: PHP

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2019-11043)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2019-11043)
- [http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00011.html](http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00011.html)
- [http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00014.html](http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00014.html)
- [http://packetstormsecurity.com/files/156642/PHP-FPM-7.x-Remote-Code-Execution.html](http://packetstormsecurity.com/files/156642/PHP-FPM-7.x-Remote-Code-Execution.html)
- [https://access.redhat.com/errata/RHSA-2019:3286](https://access.redhat.com/errata/RHSA-2019:3286)
- [https://access.redhat.com/errata/RHSA-2019:3287](https://access.redhat.com/errata/RHSA-2019:3287)
- [https://access.redhat.com/errata/RHSA-2019:3299](https://access.redhat.com/errata/RHSA-2019:3299)
- [https://access.redhat.com/errata/RHSA-2019:3300](https://access.redhat.com/errata/RHSA-2019:3300)
- [https://access.redhat.com/errata/RHSA-2019:3724](https://access.redhat.com/errata/RHSA-2019:3724)
- [https://access.redhat.com/errata/RHSA-2019:3735](https://access.redhat.com/errata/RHSA-2019:3735)
- [https://access.redhat.com/errata/RHSA-2019:3736](https://access.redhat.com/errata/RHSA-2019:3736)
- [https://access.redhat.com/errata/RHSA-2020:0322](https://access.redhat.com/errata/RHSA-2020:0322)
- [https://bugs.php.net/bug.php?id=78599](https://bugs.php.net/bug.php?id=78599)
- [http://seclists.org/fulldisclosure/2020/Jan/40](http://seclists.org/fulldisclosure/2020/Jan/40)
- [https://github.com/neex/phuip-fpizdam](https://github.com/neex/phuip-fpizdam)
- [https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3W23TP6X4H7LB645FYZLUPNIRD5W3EPU/](https://lists.fedoraproject.org/archives/list/package-announce%2540lists.fedoraproject.org/message/3W23TP6X4H7LB645FYZLUPNIRD5W3EPU/)
- [https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FSNBUSPKMLUHHOADROKNG5GDWDCRHT5M/](https://lists.fedoraproject.org/archives/list/package-announce%2540lists.fedoraproject.org/message/FSNBUSPKMLUHHOADROKNG5GDWDCRHT5M/)
- [https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T62LF4ZWVV7OMMIZFO6IFO5QLZKK7YRD/](https://lists.fedoraproject.org/archives/list/package-announce%2540lists.fedoraproject.org/message/T62LF4ZWVV7OMMIZFO6IFO5QLZKK7YRD/)
- [https://seclists.org/bugtraq/2020/Jan/44](https://seclists.org/bugtraq/2020/Jan/44)
- [https://security.netapp.com/advisory/ntap-20191031-0003/](https://security.netapp.com/advisory/ntap-20191031-0003/)
- [https://support.apple.com/kb/HT210919](https://support.apple.com/kb/HT210919)
- [https://support.f5.com/csp/article/K75408500?utm\_source=f5support&amp%3Butm\_medium=RSS](https://support.f5.com/csp/article/K75408500?utm_source=f5support&amp%253Butm_medium=RSS)
- [https://usn.ubuntu.com/4166-1/](https://usn.ubuntu.com/4166-1/)
- [https://usn.ubuntu.com/4166-2/](https://usn.ubuntu.com/4166-2/)
- [https://www.debian.org/security/2019/dsa-4552](https://www.debian.org/security/2019/dsa-4552)
- [https://www.debian.org/security/2019/dsa-4553](https://www.debian.org/security/2019/dsa-4553)
- [https://www.synology.com/security/advisory/Synology\_SA\_19\_36](https://www.synology.com/security/advisory/Synology_SA_19_36)
- [https://www.tenable.com/security/tns-2021-14](https://www.tenable.com/security/tns-2021-14)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2019-11043 · Markdown: https://rewindex.com/cve/CVE-2019-11043.md · JSON: https://rewindex.com/api/v1/cves/CVE-2019-11043 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:06:20.660Z