CVE-2022-23084: Freebsd

High severity, CVSS 7.5. EPSS: 0.2% chance of exploitation in the next 30 days.

The total size of the user-provided nmreq to nmreq_copyin() was first computed and then trusted during the copyin. This time-of-check to time-of-use bug could lead to kernel memory corruption. On systems configured to include netmap in their devfs_ruleset, a privileged process running in a jail can affect the host environment.

Affected products

• Freebsd Freebsd: from 12.0, before 12.3 (fixed in 12.3); version 12.3 only; version 13.0 only

Published 2024-02-15. Last modified 2026-06-17.