CVE-2026-4748
highpriority · track · 0EPSS 0.003 · 16 %ileDEEURUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
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affected products (15)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-0878FreeBSD Project FreeBSD OS: Mehrere SchwachstellenDeutsch2026-03-25csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in FreeBSD Project FreeBSD OS ausnutzen, um einen Denial of Service Angriff durchzuführen, um beliebigen Programmcode auszuführen, und um Sicherheitsvorkehrungen zu umgehen.
also known as (4)
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sources
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references (4)
External citations — patches, advisories, analysis.
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