CVE-2023-27567: OpenBSD

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

In OpenBSD 7.2, a TCP packet with destination port 0 that matches a pf divert-to rule can crash the kernel.

Affected products

• OpenBSD OpenBSD: version 7.2 only

Published 2023-03-03. Last modified 2026-06-17.