{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43084", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:55.983Z", "datePublished": "2026-05-06T07:40:19.253Z", "dateUpdated": "2026-05-11T22:17:24.983Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T22:17:24.983Z"}, "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."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/net/netfilter/nf_queue.h", "net/netfilter/nfnetlink_queue.c"], "versions": [{"version": "371de2bef6582a3f58049b3d18e190924af9c9a0", "lessThan": "22730cb96093b5be0609063bbb1923dbecd61252", "status": "affected", "versionType": "git"}, {"version": "870e3e63da8e88daffe9d692a025c711658018a8", "lessThan": "41e3652a178cb0eecd48e0e6e27fbb73a004046a", "status": "affected", "versionType": "git"}, {"version": "70e2e3ce4f6841e12ec1c104fc76c0e707398ec4", "lessThan": "9e5ebef91120d2764aefe557c3a484b6288f341f", "status": "affected", "versionType": "git"}, {"version": "e19079adcd26a25d7d3e586b1837493361fdf8b6", "lessThan": "936206e3f6ff411581e615e930263d6f8b78df9d", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/net/netfilter/nf_queue.h", "net/netfilter/nfnetlink_queue.c"], "versions": [{"version": "6.12.75", "lessThan": "6.12.83", "status": "affected", "versionType": "semver"}, {"version": "6.18.14", "lessThan": "6.18.24", "status": "affected", "versionType": "semver"}, {"version": "6.19.4", "lessThan": "6.19.14", "status": "affected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.75", "versionEndExcluding": "6.12.83"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18.14", "versionEndExcluding": "6.18.24"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19.4", "versionEndExcluding": "6.19.14"}]}]}], "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"}}}}

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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E1A21D87-0999-4B99-8C46-E845E91596BC", "versionEndExcluding": "6.12.83", "versionStartIncluding": "6.12.75", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "F1EF34AA-110D-41A4-A945-0F3F8D525789", "versionEndExcluding": "6.18.24", "versionStartIncluding": "6.18.14", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "92491DD1-C41C-4797-A5EB-8523985265BA", "versionEndExcluding": "6.19.14", "versionStartIncluding": "6.19.4", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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."}], "id": "CVE-2026-43084", "lastModified": "2026-05-20T23:06:46.363", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-05-06T10:16:21.610", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/22730cb96093b5be0609063bbb1923dbecd61252"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/41e3652a178cb0eecd48e0e6e27fbb73a004046a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/936206e3f6ff411581e615e930263d6f8b78df9d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9e5ebef91120d2764aefe557c3a484b6288f341f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Undergoing Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: netfilter: nfnetlink_queue: make hash table per queue", "id": "2467021", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467021"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-364", "details": ["A flaw was found in the Linux kernel's netfilter component. This vulnerability, a use-after-free, occurs due to the sharing of a global hash table among all queues in `nfnetlink_queue`. This allows a parallel CPU to access a `nf_queue_entry` after it has been freed, leading to a system crash and a Denial of Service (DoS)."], "name": "CVE-2026-43084", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43084\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43084\nhttps://lore.kernel.org/linux-cve-announce/2026050615-CVE-2026-43084-963f@gregkh/T"], "threat_severity": "Moderate"}

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