{"id":"CVE-2026-43084","summary":"netfilter: nfnetlink_queue: make hash table per queue","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_queue: make hash table per queue\n\nSharing a global hash table among all queues is tempting, but\nit can cause crash:\n\nBUG: KASAN: slab-use-after-free in nfqnl_recv_verdict+0x11ac/0x15e0 [nfnetlink_queue]\n[..]\n nfqnl_recv_verdict+0x11ac/0x15e0 [nfnetlink_queue]\n nfnetlink_rcv_msg+0x46a/0x930\n kmem_cache_alloc_node_noprof+0x11e/0x450\n\nstruct nf_queue_entry is freed via kfree, but parallel cpu can still\nencounter such an nf_queue_entry when walking the list.\n\nAlternative fix is to free the nf_queue_entry via kfree_rcu() instead,\nbut as we have to alloc/free for each skb this will cause more mem\npressure.","modified":"2026-07-11T03:55:38.539337974Z","published":"2026-05-06T07:40:19.253Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43084.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/22730cb96093b5be0609063bbb1923dbecd61252"},{"type":"WEB","url":"https://git.kernel.org/stable/c/41e3652a178cb0eecd48e0e6e27fbb73a004046a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/936206e3f6ff411581e615e930263d6f8b78df9d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9e5ebef91120d2764aefe557c3a484b6288f341f"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43084.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43084"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"371de2bef6582a3f58049b3d18e190924af9c9a0"},{"fixed":"22730cb96093b5be0609063bbb1923dbecd61252"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"870e3e63da8e88daffe9d692a025c711658018a8"},{"fixed":"41e3652a178cb0eecd48e0e6e27fbb73a004046a"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"70e2e3ce4f6841e12ec1c104fc76c0e707398ec4"},{"fixed":"9e5ebef91120d2764aefe557c3a484b6288f341f"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"e19079adcd26a25d7d3e586b1837493361fdf8b6"},{"fixed":"936206e3f6ff411581e615e930263d6f8b78df9d"}]}],"versions":["v6.12.82","v6.12.81","v6.12.80","v6.12.79","v6.12.78","v6.12.77","v6.12.76","v6.12.75","v6.18.23","v6.18.22","v6.18.21","v6.18.20","v6.18.19","v6.18.18","v6.18.17","v6.18.16","v6.18.15","v6.18.14","v6.19.13","v6.19.12","v6.19.11","v6.19.10","v6.19.9","v6.19.8","v6.19.7","v6.19.6","v6.19.5","v6.19.4"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43084.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.12.75"},{"fixed":"6.12.83"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.18.14"},{"fixed":"6.18.24"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.4"},{"fixed":"6.19.14"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43084.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}