CVE-2014-3669: PHP

High severity, CVSS 7.5. EPSS: 28.9% chance of exploitation in the next 30 days.

Integer overflow in the object_custom function in ext/standard/var_unserializer.c in PHP before 5.4.34, 5.5.x before 5.5.18, and 5.6.x before 5.6.2 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via an argument to the unserialize function that triggers calculation of a large length value.

Affected products

• PHP PHP: up to and including 5.4.33; version 5.4.0 only; version 5.4.1 only; version 5.4.2 only; version 5.4.3 only; version 5.4.4 only; …

Published 2014-10-29. Last modified 2026-06-17.