CVE-2002-0820: Freebsd

High severity, CVSS 7.2. EPSS: 0.4% chance of exploitation in the next 30 days.

FreeBSD kernel 4.6 and earlier closes the file descriptors 0, 1, and 2 after they have already been assigned to /dev/null when the descriptors reference procfs or linprocfs, which could allow local users to reuse the file descriptors in a setuid or setgid program to modify critical data and gain privileges.

Affected products

• Freebsd Freebsd: version 4.6 only

Published 2002-08-12. Last modified 2026-06-16.