{"api_version":"1","generated_at":"2026-05-08T03:59:43+00:00","cve":"CVE-2026-43084","urls":{"html":"https://cve.report/CVE-2026-43084","api":"https://cve.report/api/cve/CVE-2026-43084.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43084","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43084"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-05-06 10:16:21","updated_at":"2026-05-06 13:08:07"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/9e5ebef91120d2764aefe557c3a484b6288f341f","name":"https://git.kernel.org/stable/c/9e5ebef91120d2764aefe557c3a484b6288f341f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/22730cb96093b5be0609063bbb1923dbecd61252","name":"https://git.kernel.org/stable/c/22730cb96093b5be0609063bbb1923dbecd61252","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/936206e3f6ff411581e615e930263d6f8b78df9d","name":"https://git.kernel.org/stable/c/936206e3f6ff411581e615e930263d6f8b78df9d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/41e3652a178cb0eecd48e0e6e27fbb73a004046a","name":"https://git.kernel.org/stable/c/41e3652a178cb0eecd48e0e6e27fbb73a004046a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-43084","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43084","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 371de2bef6582a3f58049b3d18e190924af9c9a0 22730cb96093b5be0609063bbb1923dbecd61252 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 870e3e63da8e88daffe9d692a025c711658018a8 41e3652a178cb0eecd48e0e6e27fbb73a004046a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 70e2e3ce4f6841e12ec1c104fc76c0e707398ec4 9e5ebef91120d2764aefe557c3a484b6288f341f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e19079adcd26a25d7d3e586b1837493361fdf8b6 936206e3f6ff411581e615e930263d6f8b78df9d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.12.75 6.12.83 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.18.14 6.18.24 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.19.4 6.19.14 semver","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["include/net/netfilter/nf_queue.h","net/netfilter/nfnetlink_queue.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"22730cb96093b5be0609063bbb1923dbecd61252","status":"affected","version":"371de2bef6582a3f58049b3d18e190924af9c9a0","versionType":"git"},{"lessThan":"41e3652a178cb0eecd48e0e6e27fbb73a004046a","status":"affected","version":"870e3e63da8e88daffe9d692a025c711658018a8","versionType":"git"},{"lessThan":"9e5ebef91120d2764aefe557c3a484b6288f341f","status":"affected","version":"70e2e3ce4f6841e12ec1c104fc76c0e707398ec4","versionType":"git"},{"lessThan":"936206e3f6ff411581e615e930263d6f8b78df9d","status":"affected","version":"e19079adcd26a25d7d3e586b1837493361fdf8b6","versionType":"git"}]},{"defaultStatus":"unaffected","product":"Linux","programFiles":["include/net/netfilter/nf_queue.h","net/netfilter/nfnetlink_queue.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"6.12.83","status":"affected","version":"6.12.75","versionType":"semver"},{"lessThan":"6.18.24","status":"affected","version":"6.18.14","versionType":"semver"},{"lessThan":"6.19.14","status":"affected","version":"6.19.4","versionType":"semver"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.83","versionStartIncluding":"6.12.75","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.24","versionStartIncluding":"6.18.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.14","versionStartIncluding":"6.19.4","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-05-06T07:40:19.253Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/22730cb96093b5be0609063bbb1923dbecd61252"},{"url":"https://git.kernel.org/stable/c/41e3652a178cb0eecd48e0e6e27fbb73a004046a"},{"url":"https://git.kernel.org/stable/c/9e5ebef91120d2764aefe557c3a484b6288f341f"},{"url":"https://git.kernel.org/stable/c/936206e3f6ff411581e615e930263d6f8b78df9d"}],"title":"netfilter: nfnetlink_queue: make hash table per queue","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-43084","datePublished":"2026-05-06T07:40:19.253Z","dateReserved":"2026-05-01T14:12:55.983Z","dateUpdated":"2026-05-06T07:40:19.253Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-06 10:16:21","lastModifiedDate":"2026-05-06 13:08:07","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"43084","Ordinal":"1","Title":"netfilter: nfnetlink_queue: make hash table per queue","CVE":"CVE-2026-43084","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"43084","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"netfilter: nfnetlink_queue: make hash table per queue"}]}}}