CVE-2026-43084High· 7.8▾ TwilightIn 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-fre…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · 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. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 16.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
Last analysed / modified upstream
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.
Linux >= 371de2bef6582a3f58049b3d18e190924af9c9a0 < 22730cb96093b5be0609063bbb1923dbecd61252Linux >= 870e3e63da8e88daffe9d692a025c711658018a8 < 41e3652a178cb0eecd48e0e6e27fbb73a004046aLinux >= 70e2e3ce4f6841e12ec1c104fc76c0e707398ec4 < 9e5ebef91120d2764aefe557c3a484b6288f341fLinux >= e19079adcd26a25d7d3e586b1837493361fdf8b6 < 936206e3f6ff411581e615e930263d6f8b78df9dLinux >= 6.12.75 < 6.12.83Linux >= 6.18.14 < 6.18.24Linux >= 6.19.4 < 6.19.14Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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