title: TCP spoofing vulnerability in pf(4)
description: In versions of FreeBSD 14.0-RELEASE before 14-RELEASE-p2, FreeBSD 13.2-RELEASE before 13.2-RELEASE-p7 and FreeBSD 12.4-RELEASE before 12.4-RELEASE-p9, the pf(4) packet filter incorrectly validates TCP sequence numbers.  This could allow a malicious actor to execute a denial-of-service attack against hosts behind the firewall.
affected:
{
defaultStatus: unknown
modules: pf
product: FreeBSD
vendor: FreeBSD
versions:
lessThan: p2, status: affected, version: 14.0-RELEASE, versionType: release
lessThan: p7, status: affected, version: 13.2-RELEASE, versionType: release
lessThan: p9, status: affected, version: 12.4-RELEASE, versionType: release
}