CVE-2019-5598: Freebsd

High severity, CVSS 7.5. EPSS: 3.3% chance of exploitation in the next 30 days.

In FreeBSD 11.3-PRERELEASE before r345378, 12.0-STABLE before r345377, 11.2-RELEASE before 11.2-RELEASE-p10, and 12.0-RELEASE before 12.0-RELEASE-p4, a bug in pf does not check if the outer ICMP or ICMP6 packet has the same destination IP as the source IP of the inner protocol packet allowing a maliciously crafted ICMP/ICMP6 packet could bypass the packet filter rules and be passed to a host that would otherwise be unavailable.

Affected products

• Freebsd Freebsd: version 11.2 only; version 12.0 only

Published 2019-05-15. Last modified 2026-06-17.