CVE-2001-1047: OpenBSD

Low severity, CVSS 1.2. EPSS: 0.3% chance of exploitation in the next 30 days.

Race condition in OpenBSD VFS allows local users to cause a denial of service (kernel panic) by (1) creating a pipe in one thread and causing another thread to set one of the file descriptors to NULL via a close, or (2) calling dup2 on a file descriptor in one process, then setting the descriptor to NULL via a close in another process that is created via rfork.

Affected products

• OpenBSD OpenBSD: version 2.6 only; version 2.7 only; version 2.8 only; version 2.9 only

Published 2001-06-02. Last modified 2026-06-16.