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PHP CVEs

Vulnerabilities in the PHP language itself, and which PHP versions they affect.

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CVE-2020-7065

HIGH 8.8 CVSS 3.1
Published
April 1, 2020
Last modified
June 17, 2026
NVD status
Modified
Reported by
security@php.net
Weakness
CWE-121, CWE-787
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Description

In PHP versions 7.3.x below 7.3.16 and 7.4.x below 7.4.4, while using mb_strtolower() function with UTF-32LE encoding, certain invalid strings could cause PHP to overwrite stack-allocated buffer. This could lead to memory corruption, crashes and potentially code execution.

Affected products and versions

  • PHP — From 7.3.0 (including) to 7.3.16 (excluding)
  • PHP — From 7.4.0 (including) to 7.4.4 (excluding)

References

  • bugs.php.net https://bugs.php.net/bug.php?id=79371 Exploit, Issue Tracking, Patch, Vendor Advisory
  • security.netapp.com https://security.netapp.com/advisory/ntap-20200403-0001/ Third Party Advisory
  • usn.ubuntu.com https://usn.ubuntu.com/4330-1/ Third Party Advisory
  • usn.ubuntu.com https://usn.ubuntu.com/4330-2/ Third Party Advisory
  • www.debian.org https://www.debian.org/security/2020/dsa-4719 Third Party Advisory
  • www.oracle.com https://www.oracle.com/security-alerts/cpuoct2021.html Patch, Third Party Advisory
  • www.php.net https://www.php.net/ChangeLog-7.php#7.4.4 Release Notes, Vendor Advisory
  • www.tenable.com https://www.tenable.com/security/tns-2021-14 Third Party Advisory
  • nvd.nist.gov Official NVD record