{"id":"CVE-2026-43084","revision":"fc3a1393af694381aacafd680492f3a2","records":[{"revision":"fc3a1393af694381aacafd680492f3a2","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-43084","aliases":[],"title":"netfilter: nfnetlink_queue: make hash table per queue","description":"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.","state":0,"publishedAt":"2026-05-06T07:40:19.253+00:00","modifiedAt":"2026-10-19T19:06:13.178+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"include/net/netfilter/nf_queue.h\",\n                        \"net/netfilter/nfnetlink_queue.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"371de2bef6582a3f58049b3d18e190924af9c9a0\",\n                            \"lessThan\": \"22730cb96093b5be0609063bbb1923dbecd61252\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"870e3e63da8e88daffe9d692a025c711658018a8\",\n                            \"lessThan\": \"41e3652a178cb0eecd48e0e6e27fbb73a004046a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"70e2e3ce4f6841e12ec1c104fc76c0e707398ec4\",\n                            \"lessThan\": \"9e5ebef91120d2764aefe557c3a484b6288f341f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e19079adcd26a25d7d3e586b1837493361fdf8b6\",\n                            \"lessThan\": \"936206e3f6ff411581e615e930263d6f8b78df9d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"include/net/netfilter/nf_queue.h\",\n                        \"net/netfilter/nfnetlink_queue.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.12.75\",\n                            \"lessThan\": \"6.12.83\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.14\",\n                            \"lessThan\": \"6.18.24\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19.4\",\n                            \"lessThan\": \"6.19.14\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/22730cb96093b5be0609063bbb1923dbecd61252","https://git.kernel.org/stable/c/41e3652a178cb0eecd48e0e6e27fbb73a004046a","https://git.kernel.org/stable/c/9e5ebef91120d2764aefe557c3a484b6288f341f","https://git.kernel.org/stable/c/936206e3f6ff411581e615e930263d6f8b78df9d"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43084","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-43084","identifiers":["CVE-2026-43084"]},"retained":false,"historicalAffected":[]}],"coverage":[]}