netfilter: nft_compat: ebtables emulation must reject non-bridge targets (CVE-2026-72416) | HOL Guard CVE

High · CVSS 7.3CVE-2026-72416

netfilter: nft_compat: ebtables emulation must reject non-bridge targets

Answer in brief

CVE-2026-72416 records a High severity (CVSS 7.3) vulnerability in netfilter: nft_compat: ebtables emulation must reject non-bridge targets. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 15, 2026Updated Aug 17, 2026Source checked Sep 30, 2026First seen by HOL Aug 15, 2026Material review Aug 17, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.3
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=0ca743a5599199152a31a7146b83213c786c2eb2 <efc17b9240d821c424bc5191a5c6e9384a06293e \|\| >=0ca743a5599199152a31a7146b83213c786c2eb2 <b3f7a84540a0d014ec42343ff5909657c1bd1994 \|\| >=0ca743a5599199152a31a7146b83213c786c2eb2 <33e1875d6b5b552a2e5652b40074c604199354ee \|\| >=0ca743a5599199152a31a7146b83213c786c2eb2 <c129b0185e707dce405968e21afccd5728b2ce63 \|\| >=0ca743a5599199152a31a7146b83213c786c2eb2 <9dbba7e694ec045f21ede2f892fb42b81b4e1692	efc17b9240d821c424bc5191a5c6e9384a06293e, b3f7a84540a0d014ec42343ff5909657c1bd1994, 33e1875d6b5b552a2e5652b40074c604199354ee, c129b0185e707dce405968e21afccd5728b2ce63, 9dbba7e694ec045f21ede2f892fb42b81b4e1692
Linux/Linuxgeneric	3.13	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to efc17b9240d821c424bc5191a5c6e9384a06293e if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 15, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_compat: ebtables emulation must reject non-bridge targets xtables targets return netfilter verdicts: NF_ACCEPT, NF_DROP, and so on. ebtables targets return incompatible verdicts: EBT_ACCEPT, EBT_DROP, ... We cannot allow fallback to NFPROTO_UNSPEC. ebtables doesn't permit this since 11ff7288beb2 ("netfilter: ebtables: reject non-bridge targets") but that commit missed the nft_compat layer.

Quoted source text, attributed separately from HOL analysis.