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

AI Predicted 5.3 Difficulty: Moderate EPSS 0.46% · P38

Affected Version Matrix 4

VendorProductVersion RangeStatus
PHP GroupPHP8.2.*< 8.2.31affected
8.3.*< 8.3.31affected
8.4.*< 8.4.21affected
8.5.*< 8.5.6affected
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I. Basic Information for CVE-2026-7568

Vulnerability Information
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Vulnerability Title
Signed integer overflow in metaphone()
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
PHP 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PHP是PHP开源的一种在服务器端执行的脚本语言。 PHP 8.2.31之前版本、8.3.31之前版本、8.4.21之前版本和8.5.6之前版本存在缓冲区错误漏洞，该漏洞源于metaphone()函数使用有符号整数变量跟踪输入字符串中的当前位置，当传递超过2147483647字节的字符串时发生有符号整数溢出，导致未定义行为，可能引发越界读取造成段错误或访问无关内存，影响PHP进程的可用性。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
PHP GroupPHP 8.2.* ~ 8.2.31 -

II. Public POCs for CVE-2026-7568

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III. Intelligence Information for CVE-2026-7568

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Vendor Advisories for CVE-2026-7568 (1)

Same Patch Batch · PHP Group · 2026-05-10 · 10 CVEs total

CVE-2026-67229.5 CRITICALUse-After-Free in SOAP using Apache map
CVE-2026-7258Out-of-bounds read in urldecode() on NetBSD
CVE-2026-7262NULL pointer dereference in SOAP apache:Map decoder with missing <value>
CVE-2026-7261SoapServer session-persisted object use-after-free via SOAP header fault
CVE-2026-7259Null pointer dereference in php_mb_check_encoding() via mb_ereg_search_init()
CVE-2026-6735XSS within PHP-FPM status endpoint
CVE-2025-14179SQL injection in pdo_firebird via NUL bytes in quoted strings
CVE-2026-7263DoS attack via DOMNode::C14N()
CVE-2026-6104Global buffer over-read in mb_convert_encoding() with attacker-supplied encoding

IV. Related Vulnerabilities

Same product: PHP
Same vendor: PHP Group
Same weakness: CWE-190

V. Comments for CVE-2026-7568

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