CVE-2026-43451None▾ SunlitIn 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 s…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
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.
Linux >= 8d45ff22f1b43249f0cf1baafe0262ca10d1666e < a907bea273b60d3e604ec4e8e1f6c49954805794Linux >= 8d45ff22f1b43249f0cf1baafe0262ca10d1666e < 0b18d1b834ab5a5009be70b530f978d7989e445bLinux >= 8d45ff22f1b43249f0cf1baafe0262ca10d1666e < b38d2b4603fd3dda24eb8b3dd81c18a0930be97bLinux >= 8d45ff22f1b43249f0cf1baafe0262ca10d1666e < 47b1c5d1b0944aa88299f55a846fabaefc756982Linux >= 8d45ff22f1b43249f0cf1baafe0262ca10d1666e < cf4a4df38d1747e06fc54f9879bd7a6f4178032fLinux >= 8d45ff22f1b43249f0cf1baafe0262ca10d1666e < 9853d94b82d303fc4ac37d592a23a154096ecd41Linux >= 8d45ff22f1b43249f0cf1baafe0262ca10d1666e < 208669df703a25a601f45822b10c413f258bf275Linux >= 8d45ff22f1b43249f0cf1baafe0262ca10d1666e < f1ba83755d81c6fc66ac7acd723d238f974091e9Linux 4.7Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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