Vulnerability DatabaseCVE-2025-6491
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CVE-2025-6491
July 13, 2025
NULL Pointer Dereference in PHP SOAP Extension via Large XML Namespace Prefix
Affected Packages
https://github.com/php/php-src.git (GITHUB):
Affected version(s) >=php-8.3.0RC1 <php-8.3.23
Fix Suggestion:
Update to version php-8.3.23
https://github.com/php/php-src.git (GITHUB):
Affected version(s) >=php-4.0.0 <php-8.1.33
Fix Suggestion:
Update to version php-8.1.33
https://github.com/php/php-src.git (GITHUB):
Affected version(s) >=php-8.4.0RC1 <php-8.4.10
Fix Suggestion:
Update to version php-8.4.10
https://github.com/php/php-src.git (GITHUB):
Affected version(s) >=php-8.2.0RC1 <php-8.2.29
Fix Suggestion:
Update to version php-8.2.29
Related Resources (4)
http://www.openwall.com/lists/oss-security/2025/07/11/4
https://lists.debian.org/debian-lts-announce/2025/07/msg00017.html
https://github.com/php/php-src/security/advisories/GHSA-453j-q27h-5p8x
https://security-tracker.debian.org/tracker/CVE-2025-6491
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CVSS v4
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.9
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
NULL Pointer Dereference
CWE-476
EPSS
Base Score:
0.15