php-mbstring phpmbregexeregreplaceexec() - double free (CVE-2016-5768).
php-mcrypt heap Overflow due to integer overflows (CVE-2016-5769).
php-SPL int/size_t confusion in SplFileObject::fread (CVE-2016-5770).
php-SPL Use After Free Vulnerability in PHP's GC algorithm and unserialize (CVE-2016-5771).
php-WDDX Double Free Courruption in wddx_deserialize (CVE-2016-5772).
php-zip ZipArchive class Use After Free Vulnerability in PHP's GC algorithm and unserialize (CVE-2016-5773).
The php package has been updated to version 5.6.23, fixing these issues and several other bugs. See the upstream ChangeLog for details.