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Vulnerability record · CVE-2020-7062 · published 27 February 2020

CVE-2020-7062: Php null pointer dereference vulnerability

Php · Php

In PHP versions 7.2.x below 7.2.28, 7.3.x below 7.3.15 and 7.4.x below 7.4.3, when using file upload functionality, if upload progress tracking is enabled, but session.upload_progress.cleanup is set to 0 (disabled), and the file upload fails, the upload procedure would try to clean up data that does not exist and encounter null pointer dereference, which would likely lead to a crash.

7.5 CVSS 3.1 High EPSS 3.6% · top 11.0% CWE-476 · NULL pointer dereference
7.5CVSS 3.1 base score, v2 4.3
3.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
16References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

In PHP versions 7.2.x below 7.2.28, 7.3.x below 7.3.15 and 7.4.x below 7.4.3, when using file upload functionality, if upload progress tracking is enabled, but session.upload_progress.cleanup is set to 0 (disabled), and the file upload fails, the upload procedure would try to clean up data that does not exist and encounter null pointer dereference, which would likely lead to a crash.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00023.html Mailing ListThird Party Advisory
https://bugs.php.net/bug.php?id=79221 ExploitVendor Advisory
https://lists.debian.org/debian-lts-announce/2020/03/msg00034.html Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/202003-57 Third Party Advisory
https://usn.ubuntu.com/4330-1/ Third Party Advisory
https://www.debian.org/security/2020/dsa-4717 Third Party Advisory
https://www.debian.org/security/2020/dsa-4719 Third Party Advisory
https://www.tenable.com/security/tns-2021-14 Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00023.html Mailing ListThird Party Advisory
https://bugs.php.net/bug.php?id=79221 ExploitVendor Advisory
https://lists.debian.org/debian-lts-announce/2020/03/msg00034.html Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/202003-57 Third Party Advisory
https://usn.ubuntu.com/4330-1/ Third Party Advisory
https://www.debian.org/security/2020/dsa-4717 Third Party Advisory
https://www.debian.org/security/2020/dsa-4719 Third Party Advisory
https://www.tenable.com/security/tns-2021-14 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-7062), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.