Description
In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, the metaphone() function in ext/standard/metaphone.c uses a signed int variable to track the current position within the input string. If a string longer than 2,147,483,647 bytes is passed, a signed integer overflow occurs, resulting in undefined behavior. This can lead to an out-of-bounds read, causing a segmentation fault or access to unrelated memory, and may affect the availability of the PHP process.
Published: 2026-05-10
Score: 6.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4586-1 php7.4 security update
Debian DSA Debian DSA DSA-6255-1 php8.2 security update
Debian DSA Debian DSA DSA-6256-1 php8.4 security update
History

Tue, 12 May 2026 17:45:00 +0000

Type Values Removed Values Added
First Time appeared Php
Php php
CPEs cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
Vendors & Products Php
Php php
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Mon, 11 May 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sun, 10 May 2026 05:45:00 +0000

Type Values Removed Values Added
First Time appeared Php Group
Php Group php
Vendors & Products Php Group
Php Group php

Sun, 10 May 2026 04:45:00 +0000

Type Values Removed Values Added
Description In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, the metaphone() function in ext/standard/metaphone.c uses a signed int variable to track the current position within the input string. If a string longer than 2,147,483,647 bytes is passed, a signed integer overflow occurs, resulting in undefined behavior. This can lead to an out-of-bounds read, causing a segmentation fault or access to unrelated memory, and may affect the availability of the PHP process.
Title Signed integer overflow in metaphone()
Weaknesses CWE-125
CWE-190
References
Metrics cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/RE:L/U:Amber'}


cve-icon MITRE

Status: PUBLISHED

Assigner: php

Published:

Updated: 2026-05-11T13:25:17.197Z

Reserved: 2026-04-30T21:08:49.047Z

Link: CVE-2026-7568

cve-icon Vulnrichment

Updated: 2026-05-11T13:25:13.832Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-10T05:16:11.920

Modified: 2026-05-12T17:38:55.947

Link: CVE-2026-7568

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-10T06:00:06Z

Weaknesses