Answer in brief
CVE-2026-43451 records a Unknown severity vulnerability in netfilter: nfnetlink_queue: fix entry leak in bridge verdict error path. 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.
A CVSS score is not reported in the current record. 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.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=8d45ff22f1b43249f0cf1baafe0262ca10d1666e <a907bea273b60d3e604ec4e8e1f6c49954805794 || >=8d45ff22f1b43249f0cf1baafe0262ca10d1666e <0b18d1b834ab5a5009be70b530f978d7989e445b || >=8d45ff22f1b43249f0cf1baafe0262ca10d1666e <b38d2b4603fd3dda24eb8b3dd81c18a0930be97b || >=8d45ff22f1b43249f0cf1baafe0262ca10d1666e <47b1c5d1b0944aa88299f55a846fabaefc756982 || >=8d45ff22f1b43249f0cf1baafe0262ca10d1666e <cf4a4df38d1747e06fc54f9879bd7a6f4178032f || >=8d45ff22f1b43249f0cf1baafe0262ca10d1666e <9853d94b82d303fc4ac37d592a23a154096ecd41 || >=8d45ff22f1b43249f0cf1baafe0262ca10d1666e <208669df703a25a601f45822b10c413f258bf275 || >=8d45ff22f1b43249f0cf1baafe0262ca10d1666e <f1ba83755d81c6fc66ac7acd723d238f974091e9 | a907bea273b60d3e604ec4e8e1f6c49954805794, 0b18d1b834ab5a5009be70b530f978d7989e445b, b38d2b4603fd3dda24eb8b3dd81c18a0930be97b, 47b1c5d1b0944aa88299f55a846fabaefc756982, cf4a4df38d1747e06fc54f9879bd7a6f4178032f, 9853d94b82d303fc4ac37d592a23a154096ecd41, 208669df703a25a601f45822b10c413f258bf275, f1ba83755d81c6fc66ac7acd723d238f974091e9 |
| Linux/Linuxgeneric | 4.7 | Not reported |
Published upstream
May 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 6, 2026
In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_queue: fix entry leak in bridge verdict error path nfqnl_recv_verdict() calls find_dequeue_entry() to remove the queue entry from the queue data structures, taking ownership of the entry. For PF_BRIDGE packets, it then calls nfqa_parse_bridge() to parse VLAN attributes. If nfqa_parse_bridge() returns an error (e.g. NFQA_VLAN present but NFQA_VLAN_TCI missing), the function returns immediately without freeing the dequeued entry or its sk_buff. This leaks the nf_queue_entry, its associated sk_buff, and all held references (net_device refcounts, struct net refcount). Repeated triggering exhausts kernel memory. Fix this by dropping the entry via nfqnl_reinject() with NF_DROP verdict on the error path, consistent with other error handling in this file.
Quoted source text, attributed separately from HOL analysis.