PHP up to 8.2.30/8.3.30/8.4.20/8.5.5 ext/standard/metaphone.c metaphone integer overflow

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in PHP up to 8.2.30/8.3.30/8.4.20/8.5.5. Affected by this vulnerability is the function metaphone of the file ext/standard/metaphone.c. The manipulation leads to integer overflow. This vulnerability is listed as CVE-2026-7568. The attack may be initiated remotely. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in PHP up to 8.2.30/8.3.30/8.4.20/8.5.5. It has been rated as problematic. This issue affects the function metaphone of the file ext/standard/metaphone.c. The manipulation with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was presented by Aleksey Solovev as GHSA-96wq-48vp-hh57. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-7568 since 04/30/2026. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/03/2026).

The vulnerability scanner Nessus provides a plugin with the ID 313734 (Fedora 44 : php (2026-c66eaae759)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 8.2.31, 8.3.31, 8.4.21 or 8.5.6 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (313734) and CERT Bund (WID-SEC-2026-1433). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Fedora Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Microsoft Azure Linux
  • Open Source PHP
  • Zend ZendPHP
  • cPanel cPanel/WHM

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 313734
Nessus Name: Fedora 44 : php (2026-c66eaae759)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: PHP 8.2.31/8.3.31/8.4.21/8.5.6

Timelineinfo

04/30/2026 CVE reserved
05/10/2026 +10 days Advisory disclosed
05/10/2026 +0 days VulDB entry created
07/03/2026 +54 days VulDB entry last update

Sourcesinfo

Product: php.org

Advisory: GHSA-96wq-48vp-hh57
Researcher: Aleksey Solovev
Status: Confirmed

CVE: CVE-2026-7568 (🔒)
GCVE (CVE): GCVE-0-2026-7568
GCVE (VulDB): GCVE-100-362483
CERT Bund: WID-SEC-2026-1433 - PHP: Mehrere Schwachstellen

Entryinfo

Created: 05/10/2026 08:59
Updated: 07/03/2026 16:34
Changes: 05/10/2026 08:59 (71), 05/10/2026 10:42 (7), 05/11/2026 15:37 (2), 06/02/2026 02:18 (1), 06/04/2026 09:35 (1), 07/02/2026 10:11 (11), 07/03/2026 16:34 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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