CVE-2016-5399: PHP

High severity, CVSS 7.8. EPSS: 9.8% chance of exploitation in the next 30 days.

The bzread function in ext/bz2/bz2.c in PHP before 5.5.38, 5.6.x before 5.6.24, and 7.x before 7.0.9 allows remote attackers to cause a denial of service (out-of-bounds write) or execute arbitrary code via a crafted bz2 archive.

Affected products

• PHP PHP: up to and including 5.5.37; from 5.6.0, before 5.6.24 (fixed in 5.6.24); from 7.0.0, before 7.0.9 (fixed in 7.0.9)

Published 2017-04-21. Last modified 2026-06-17.