CVEvulnerability

CVE-2026-4748

7.5 HIGH Published 2026-04-01 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2026-04-01
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weaknesses
CWE-1023, CWE-480, CWE-754

Description

A regression in the way hashes were calculated caused rules containing the address range syntax (x.x.x.x - y.y.y.y) that only differ in the address range(s) involved to be silently dropped as duplicates. Only the first of such rules is actually loaded into pf. Ranges expressed using the address[/mask-bits] syntax were not affected. Some keywords representing actions taken on a packet-matching rule, such as 'log', 'return tll', or 'dnpipe', may suffer from the same issue. It is unlikely that users have such configurations, as these rules would always be redundant. Affected rules are silently ignored, which can lead to unexpected behaviour including over- and underblocking.

Affected configurations

• freebsd freebsd (>= 14.0 < 14.4) • freebsd freebsd 14.3 • freebsd freebsd 14.4 • freebsd freebsd 15.0

Related

Weakness · CWE (3)

  • CWE-1023 Incomplete Comparison with Missing Factors weakness
  • CWE-480 Use of Incorrect Operator weakness
  • CWE-754 Improper Check for Unusual or Exceptional Conditions weakness

References