Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.12.75, < 6.12.83 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/22730cb96093b5be0609063bbb1923dbecd61252Patch
- https://git.kernel.org/stable/c/41e3652a178cb0eecd48e0e6e27fbb73a004046aPatch
- https://git.kernel.org/stable/c/936206e3f6ff411581e615e930263d6f8b78df9dPatch
- https://git.kernel.org/stable/c/9e5ebef91120d2764aefe557c3a484b6288f341fPatch
FAQ
What is CVE-2026-43084?
CVE-2026-43084 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 c...
How severe is CVE-2026-43084?
CVE-2026-43084 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-43084?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.