CVE-2023-6534

HIGH

FreeBSD <14.0-RELEASE-p2,13.2-RELEASE-p7,12.4-RELEASE-p9 - DoS

Title source: llm
STIX 2.1

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.

References (2)

Core 2

Scores

CVSS v3 7.5
EPSS 0.0026
EPSS Percentile 48.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

Status published
Products (3)
freebsd/freebsd 12.4 (11 CPE variants)
freebsd/freebsd 13.2 (7 CPE variants)
freebsd/freebsd 14.0 (5 CPE variants)
Published Dec 13, 2023
Tracked Since Feb 18, 2026