CVE-2026-43084

{"id": "CVE-2026-43084", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43084", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:14:29.678333Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "371de2bef6582a3f58049b3d18e190924af9c9a0", "lessThan": "22730cb96093b5be0609063bbb1923dbecd61252", "versionType": "git"}, {"status": "affected", "version": "870e3e63da8e88daffe9d692a025c711658018a8", "lessThan": "41e3652a178cb0eecd48e0e6e27fbb73a004046a", "versionType": "git"}, {"status": "affected", "version": "70e2e3ce4f6841e12ec1c104fc76c0e707398ec4", "lessThan": "9e5ebef91120d2764aefe557c3a484b6288f341f", "versionType": "git"}, {"status": "affected", "version": "e19079adcd26a25d7d3e586b1837493361fdf8b6", "lessThan": "936206e3f6ff411581e615e930263d6f8b78df9d", "versionType": "git"}], "programFiles": ["include/net/netfilter/nf_queue.h", "net/netfilter/nfnetlink_queue.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.12.75", "lessThan": "6.12.83", "versionType": "semver"}, {"status": "affected", "version": "6.18.14", "lessThan": "6.18.24", "versionType": "semver"}, {"status": "affected", "version": "6.19.4", "lessThan": "6.19.14", "versionType": "semver"}], "programFiles": ["include/net/netfilter/nf_queue.h", "net/netfilter/nfnetlink_queue.c"], "defaultStatus": "unaffected"}]}], "published": "2026-05-06T10:16:21.610", "references": [{"url": "https://git.kernel.org/stable/c/22730cb96093b5be0609063bbb1923dbecd61252", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/41e3652a178cb0eecd48e0e6e27fbb73a004046a", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/936206e3f6ff411581e615e930263d6f8b78df9d", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9e5ebef91120d2764aefe557c3a484b6288f341f", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-416"}]}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-416"}]}], "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."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnetfilter: nfnetlink_queue: hacer tabla hash por cola\n\nCompartir una tabla hash global entre todas las colas es tentador, pero puede causar un fallo:\n\nBUG: KASAN: uso despu\u00e9s de liberaci\u00f3n de slab en nfqnl_recv_verdict+0x 11ac/0x 15e0 [nfnetlink_queue]\n[..]\n nfqnl_recv_verdict+0x 11ac/0x 15e0 [nfnetlink_queue]\n nfnetlink_rcv_msg+0x46a/0x930\n kmem_cache_alloc_node_noprof+0x11e/0x450\n\nLa estructura nf_queue_entry es liberada v\u00eda kfree, pero una CPU paralela a\u00fan puede encontrar dicha nf_queue_entry al recorrer la lista.\n\nUna soluci\u00f3n alternativa es liberar la nf_queue_entry v\u00eda kfree_rcu() en su lugar, pero como tenemos que asignar/liberar para cada skb, esto causar\u00e1 m\u00e1s presi\u00f3n de memoria."}], "lastModified": "2026-11-11T21:10:00.200", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E1A21D87-0999-4B99-8C46-E845E91596BC", "versionEndExcluding": "6.12.83", "versionStartIncluding": "6.12.75"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F1EF34AA-110D-41A4-A945-0F3F8D525789", "versionEndExcluding": "6.18.24", "versionStartIncluding": "6.18.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "92491DD1-C41C-4797-A5EB-8523985265BA", "versionEndExcluding": "6.19.14", "versionStartIncluding": "6.19.4"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}