CVE-2026-43084
7.8 HIGHIn the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_queue: make hash table per queue Sharing a glo...
Published: 2026-05-06 · Last updated: 2026-06-05
Severity and scoring
- CVSS
- 7.8 HIGH
- Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CWE
- CWE-416
Affected products
| Vendor | Product |
|---|---|
| linux | linux_kernel |
Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_queue: make hash table per queue Sharing a global hash table among all queues is tempting, but it can cause crash: BUG: KASAN: slab-use-after-free in nfqnl_recv_verdict+0x11ac/0x15e0 [nfnetlink_queue] [..] nfqnl_recv_verdict+0x11ac/0x15e0 [nfnetlink_queue] nfnetlink_rcv_msg+0x46a/0x930 kmem_cache_alloc_node_noprof+0x11e/0x450 struct nf_queue_entry is freed via kfree, but parallel cpu can still encounter such an nf_queue_entry when walking the list. Alternative fix is to free the nf_queue_entry via kfree_rcu() instead, but as we have to alloc/free for each skb this will cause more mem pressure.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-43084
- [Patch]https://git.kernel.org/stable/c/22730cb96093b5be0609063bbb1923dbecd61252
- [Patch]https://git.kernel.org/stable/c/41e3652a178cb0eecd48e0e6e27fbb73a004046a
- [Patch]https://git.kernel.org/stable/c/936206e3f6ff411581e615e930263d6f8b78df9d
- [Patch]https://git.kernel.org/stable/c/9e5ebef91120d2764aefe557c3a484b6288f341f
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