CVE-2010-1861 Information

Description

The sysvshm extension for PHP 5.2 through 5.2.13 and 5.3 through 5.3.2 allows context-dependent attackers to write to arbitrary memory addresses by using an object's __sleep function to interrupt an internal call to the shm_put_var function which triggers access of a freed resource.

Reference

http://php-security.org/2010/05/05/mops-2010-009-php-shm_put_var-already-freed-resource-access-vulnerability/index.html