CVE-2002-1420: OpenBSD

High severity, CVSS 7.2. EPSS: 0.3% chance of exploitation in the next 30 days.

Integer signedness error in select() on OpenBSD 3.1 and earlier allows local users to overwrite arbitrary kernel memory via a negative value for the size parameter, which satisfies the boundary check as a signed integer, but is later used as an unsigned integer during a data copying operation.

Affected products

• OpenBSD OpenBSD: version 3.0 only; version 3.1 only

Published 2003-04-11. Last modified 2026-06-16.