Code: ZEND_API void zend_ts_hash_graceful_destroy(TsHashTable *ht)
{
	begin_write(ht);
	zend_hash_graceful_destroy(TS_HASH(ht));
	end_write(ht);
 
 #ifdef ZTS
        tsrm_mutex_free(ht->mx_reader);
       tsrm_mutex_free(ht->mx_reader);
 #endif
 }

Vulnerability Type: DoS
CWE ID: 
Summary: Double free vulnerability in the zend_ts_hash_graceful_destroy function in zend_ts_hash.c in the Zend Engine in PHP through 5.5.20 and 5.6.x through 5.6.4 allows remote attackers to cause a denial of service or possibly have unspecified other impact via unknown vectors.
Commit Message: 