CVE-2015-8878: PHP

Medium severity, CVSS 5.9. EPSS: 1.2% chance of exploitation in the next 30 days.

main/php_open_temporary_file.c in PHP before 5.5.28 and 5.6.x before 5.6.12 does not ensure thread safety, which allows remote attackers to cause a denial of service (race condition and heap memory corruption) by leveraging an application that performs many temporary-file accesses.

Affected products

• PHP PHP: from 5.5.0, before 5.5.28 (fixed in 5.5.28); from 5.6.0, before 5.6.12 (fixed in 5.6.12)

Published 2016-05-22. Last modified 2026-06-17.