CVE-2026-7568

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.

References

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-7568.json

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

https://bugzilla.redhat.com/show_bug.cgi?id=2468566

https://access.redhat.com/security/cve/CVE-2026-7568

https://access.redhat.com/errata/RHSA-2026:34354

https://access.redhat.com/errata/RHSA-2026:33449

https://access.redhat.com/errata/RHSA-2026:23388

https://access.redhat.com/errata/RHSA-2026:22649

https://access.redhat.com/errata/RHSA-2026:22305

https://access.redhat.com/errata/RHSA-2026:22143

https://access.redhat.com/errata/RHSA-2026:22142

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4

EPSS