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.
Fix
Patch, vendor advisory and mitigation references on NVD 4
- 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 Patch
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 2
- StatusAnalyzed → ModifiedNVD modified 2026-10-19 20:18
- First seenCVSS 7.8 · linuxNVD modified 2026-10-16 16:17
Affected (CPE criteria) 1
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
References 4
- 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 Patch