CVE-2019-5599: Freebsd

High severity, CVSS 7.5. EPSS: 5.1% chance of exploitation in the next 30 days.

In FreeBSD 12.0-STABLE before r349197 and 12.0-RELEASE before 12.0-RELEASE-p6, a bug in the non-default RACK TCP stack can allow an attacker to cause several linked lists to grow unbounded and cause an expensive list traversal on every packet being processed, leading to resource exhaustion and a denial of service.

Affected products

• Freebsd Freebsd: version 12.0 only

Published 2019-07-02. Last modified 2026-06-17.