CVE-2011-0753: PHP

Medium severity, CVSS 4.3. EPSS: 0.8% chance of exploitation in the next 30 days.

Race condition in the PCNTL extension in PHP before 5.3.4, when a user-defined signal handler exists, might allow context-dependent attackers to cause a denial of service (memory corruption) via a large number of concurrent signals.

Affected products

• PHP PHP: up to and including 5.3.3; version 1.0 only; version 2.0 only; version 2.0b10 only; version 3.0 only; version 3.0.1 only; …

Published 2011-02-02. Last modified 2026-06-16.