CVE-2003-0166: PHP

High severity, CVSS 7.5. EPSS: 14.1% chance of exploitation in the next 30 days.

Integer signedness error in emalloc() function for PHP before 4.3.2 allow remote attackers to cause a denial of service (memory consumption) and possibly execute arbitrary code via negative arguments to functions such as (1) socket_recv, (2) socket_recvfrom, and possibly other functions.

Affected products

• PHP PHP: version 4.0 only; version 4.0.1 only; version 4.0.2 only; version 4.0.3 only; version 4.0.4 only; version 4.0.5 only; …

Published 2003-04-02. Last modified 2026-06-16.