CVE-2011-0420: PHP

Medium severity, CVSS 5.0. EPSS: 14.4% chance of exploitation in the next 30 days.

The grapheme_extract function in the Internationalization extension (Intl) for ICU for PHP 5.3.5 allows context-dependent attackers to cause a denial of service (crash) via an invalid size argument, which triggers a NULL pointer dereference.

Affected products

• PHP PHP: version 5.3.5 only

Published 2011-02-19. Last modified 2026-06-16.