This update for php7 fixes the following issues: - CVE-2021-21703: Fixed local privilege escalation via PHP-FPM . - CVE-2021-21707: Fixed special character breaks path in xml parsing . - CVE-2017-8923: Fixed denial of service when using .= with a long string . - CVE-2015-9253: Fixed endless loop when the master process restarts a child process using program execution functions .