CVE-2006-0433: Freebsd

Medium severity, CVSS 5.0. EPSS: 2.9% chance of exploitation in the next 30 days.

Selective Acknowledgement (SACK) in FreeBSD 5.3 and 5.4 does not properly handle an incoming selective acknowledgement when there is insufficient memory, which might allow remote attackers to cause a denial of service (infinite loop).

Affected products

• Freebsd Freebsd: version 5.3 only; version 5.4 only

Published 2006-02-02. Last modified 2026-06-16.