CVE-2026-7568 — Signed integer overflow in metaphone()

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
PHP Group / PHP	affected 8.2.* before 8.2.31; affected 8.3.* before 8.3.31; affected 8.4.* before 8.4.21; affected 8.5.* before 8.5.6

CWE

CWE-190, CWE-125

References

https://github.com/php/php-src/security/advisories/GHSA-96wq-48vp-hh57

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.

redhat-SADP

A flaw was found in PHP. The metaphone() function in ext/standard/metaphone.c uses a signed int variable to track the current position within the input string. When an input string is longer than 2,147,483,647 bytes, a signed integer overflow can occur, leading to undefined behavior and an out-of-bounds read. This issue can cause a denial of service.