CVE-2017-6441

Name: CVE-2017-6441
Creator: NVD / NIST
Published: 2017-04-03T05:59:00.91+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.83%

Last modified Jun 17, 2026

CVE-2017-6441 is a vulnerability of currently unknown severity. The _zval_get_long_func_ex in Zend/zend_operators.c in PHP 7.1.2 allows attackers to cause a denial of service (NULL pointer dereference and application crash) via crafted use of "declare(ticks=" in a PHP script. NOTE: the vendor disputes the classification of this as a vulnerability, stating "Please do not request CVEs for ordinary bugs. EPSS estimates a 1.83% chance of exploitation in the next 30 days.

Description

The _zval_get_long_func_ex in Zend/zend_operators.c in PHP 7.1.2 allows attackers to cause a denial of service (NULL pointer dereference and application crash) via crafted use of "declare(ticks=" in a PHP script. NOTE: the vendor disputes the classification of this as a vulnerability, stating "Please do not request CVEs for ordinary bugs. CVEs are relevant for security issues only.

Metrics

EPSS Probability

1.83%

76.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Php	Php	7.1.2

References

https://bugs.php.net/bug.php?id=74146Issue Tracking
https://github.com/php/php-src/pull/2396Patch
https://bugs.php.net/bug.php?id=74146Issue Tracking
https://github.com/php/php-src/pull/2396Patch

Timeline

Published: Apr 3, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-6441?

How severe is CVE-2017-6441?

Severity scoring for CVE-2017-6441 is pending analysis. The EPSS model estimates a 1.83% probability of exploitation in the next 30 days.

How do I fix CVE-2017-6441?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-6441?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST