CVE-2007-4771: Icu-Project International Components For Unicode

High severity, CVSS 9.3. EPSS: 2.5% chance of exploitation in the next 30 days.

Heap-based buffer overflow in the doInterval function in regexcmp.cpp in libicu in International Components for Unicode (ICU) 3.8.1 and earlier allows context-dependent attackers to cause a denial of service (memory consumption) and possibly have unspecified other impact via a regular expression that writes a large amount of data to the backtracking stack. NOTE: some of these details are obtained from third party information.

Affected products

• Icu-Project International Components For Unicode: up to and including 3.8.1

Published 2008-01-29. Last modified 2026-06-16.