CVE-1999-0323: Bsdi Bsd OS

High severity, CVSS 10.0. EPSS: 1.4% chance of exploitation in the next 30 days.

FreeBSD mmap function allows users to modify append-only or immutable files.

Affected products

• Bsdi Bsd OS: version 3.0 only
• Freebsd Freebsd: version 2.2 only
• Netbsd Netbsd: version 2.0.4 only
• OpenBSD OpenBSD: version 2.2 only

Published 1998-02-20. Last modified 2026-06-16.