{"api_version":"1","generated_at":"2026-05-12T00:57:58+00:00","cve":"CVE-2026-43451","urls":{"html":"https://cve.report/CVE-2026-43451","api":"https://cve.report/api/cve/CVE-2026-43451.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43451","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43451"},"summary":{"title":"netfilter: nfnetlink_queue: fix entry leak in bridge verdict error path","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_queue: fix entry leak in bridge verdict error path\n\nnfqnl_recv_verdict() calls find_dequeue_entry() to remove the queue\nentry from the queue data structures, taking ownership of the entry.\nFor PF_BRIDGE packets, it then calls nfqa_parse_bridge() to parse VLAN\nattributes.  If nfqa_parse_bridge() returns an error (e.g. NFQA_VLAN\npresent but NFQA_VLAN_TCI missing), the function returns immediately\nwithout freeing the dequeued entry or its sk_buff.\n\nThis leaks the nf_queue_entry, its associated sk_buff, and all held\nreferences (net_device refcounts, struct net refcount).  Repeated\ntriggering exhausts kernel memory.\n\nFix this by dropping the entry via nfqnl_reinject() with NF_DROP verdict\non the error path, consistent with other error handling in this file.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-08 15:16:57","updated_at":"2026-05-08 15:16:57"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/9853d94b82d303fc4ac37d592a23a154096ecd41","name":"https://git.kernel.org/stable/c/9853d94b82d303fc4ac37d592a23a154096ecd41","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cf4a4df38d1747e06fc54f9879bd7a6f4178032f","name":"https://git.kernel.org/stable/c/cf4a4df38d1747e06fc54f9879bd7a6f4178032f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/47b1c5d1b0944aa88299f55a846fabaefc756982","name":"https://git.kernel.org/stable/c/47b1c5d1b0944aa88299f55a846fabaefc756982","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b38d2b4603fd3dda24eb8b3dd81c18a0930be97b","name":"https://git.kernel.org/stable/c/b38d2b4603fd3dda24eb8b3dd81c18a0930be97b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a907bea273b60d3e604ec4e8e1f6c49954805794","name":"https://git.kernel.org/stable/c/a907bea273b60d3e604ec4e8e1f6c49954805794","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f1ba83755d81c6fc66ac7acd723d238f974091e9","name":"https://git.kernel.org/stable/c/f1ba83755d81c6fc66ac7acd723d238f974091e9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0b18d1b834ab5a5009be70b530f978d7989e445b","name":"https://git.kernel.org/stable/c/0b18d1b834ab5a5009be70b530f978d7989e445b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/208669df703a25a601f45822b10c413f258bf275","name":"https://git.kernel.org/stable/c/208669df703a25a601f45822b10c413f258bf275","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-43451","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43451","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8d45ff22f1b43249f0cf1baafe0262ca10d1666e a907bea273b60d3e604ec4e8e1f6c49954805794 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8d45ff22f1b43249f0cf1baafe0262ca10d1666e 0b18d1b834ab5a5009be70b530f978d7989e445b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8d45ff22f1b43249f0cf1baafe0262ca10d1666e b38d2b4603fd3dda24eb8b3dd81c18a0930be97b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8d45ff22f1b43249f0cf1baafe0262ca10d1666e 47b1c5d1b0944aa88299f55a846fabaefc756982 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.203 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.167 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.130 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.78 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.19 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.9 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"43451","cve":"CVE-2026-43451","epss":"0.000240000","percentile":"0.070210000","score_date":"2026-05-11","updated_at":"2026-05-12 00:01:17"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/netfilter/nfnetlink_queue.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"a907bea273b60d3e604ec4e8e1f6c49954805794","status":"affected","version":"8d45ff22f1b43249f0cf1baafe0262ca10d1666e","versionType":"git"},{"lessThan":"0b18d1b834ab5a5009be70b530f978d7989e445b","status":"affected","version":"8d45ff22f1b43249f0cf1baafe0262ca10d1666e","versionType":"git"},{"lessThan":"b38d2b4603fd3dda24eb8b3dd81c18a0930be97b","status":"affected","version":"8d45ff22f1b43249f0cf1baafe0262ca10d1666e","versionType":"git"},{"lessThan":"47b1c5d1b0944aa88299f55a846fabaefc756982","status":"affected","version":"8d45ff22f1b43249f0cf1baafe0262ca10d1666e","versionType":"git"},{"lessThan":"cf4a4df38d1747e06fc54f9879bd7a6f4178032f","status":"affected","version":"8d45ff22f1b43249f0cf1baafe0262ca10d1666e","versionType":"git"},{"lessThan":"9853d94b82d303fc4ac37d592a23a154096ecd41","status":"affected","version":"8d45ff22f1b43249f0cf1baafe0262ca10d1666e","versionType":"git"},{"lessThan":"208669df703a25a601f45822b10c413f258bf275","status":"affected","version":"8d45ff22f1b43249f0cf1baafe0262ca10d1666e","versionType":"git"},{"lessThan":"f1ba83755d81c6fc66ac7acd723d238f974091e9","status":"affected","version":"8d45ff22f1b43249f0cf1baafe0262ca10d1666e","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/netfilter/nfnetlink_queue.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.7"},{"lessThan":"4.7","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.253","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.203","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.167","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.130","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.78","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.19","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.253","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.203","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.167","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.130","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.78","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.19","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.9","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"4.7","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_queue: fix entry leak in bridge verdict error path\n\nnfqnl_recv_verdict() calls find_dequeue_entry() to remove the queue\nentry from the queue data structures, taking ownership of the entry.\nFor PF_BRIDGE packets, it then calls nfqa_parse_bridge() to parse VLAN\nattributes.  If nfqa_parse_bridge() returns an error (e.g. NFQA_VLAN\npresent but NFQA_VLAN_TCI missing), the function returns immediately\nwithout freeing the dequeued entry or its sk_buff.\n\nThis leaks the nf_queue_entry, its associated sk_buff, and all held\nreferences (net_device refcounts, struct net refcount).  Repeated\ntriggering exhausts kernel memory.\n\nFix this by dropping the entry via nfqnl_reinject() with NF_DROP verdict\non the error path, consistent with other error handling in this file."}],"providerMetadata":{"dateUpdated":"2026-05-08T14:22:16.716Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/a907bea273b60d3e604ec4e8e1f6c49954805794"},{"url":"https://git.kernel.org/stable/c/0b18d1b834ab5a5009be70b530f978d7989e445b"},{"url":"https://git.kernel.org/stable/c/b38d2b4603fd3dda24eb8b3dd81c18a0930be97b"},{"url":"https://git.kernel.org/stable/c/47b1c5d1b0944aa88299f55a846fabaefc756982"},{"url":"https://git.kernel.org/stable/c/cf4a4df38d1747e06fc54f9879bd7a6f4178032f"},{"url":"https://git.kernel.org/stable/c/9853d94b82d303fc4ac37d592a23a154096ecd41"},{"url":"https://git.kernel.org/stable/c/208669df703a25a601f45822b10c413f258bf275"},{"url":"https://git.kernel.org/stable/c/f1ba83755d81c6fc66ac7acd723d238f974091e9"}],"title":"netfilter: nfnetlink_queue: fix entry leak in bridge verdict error path","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-43451","datePublished":"2026-05-08T14:22:16.716Z","dateReserved":"2026-05-01T14:12:56.010Z","dateUpdated":"2026-05-08T14:22:16.716Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-08 15:16:57","lastModifiedDate":"2026-05-08 15:16:57","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"43451","Ordinal":"1","Title":"netfilter: nfnetlink_queue: fix entry leak in bridge verdict err","CVE":"CVE-2026-43451","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"43451","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_queue: fix entry leak in bridge verdict error path\n\nnfqnl_recv_verdict() calls find_dequeue_entry() to remove the queue\nentry from the queue data structures, taking ownership of the entry.\nFor PF_BRIDGE packets, it then calls nfqa_parse_bridge() to parse VLAN\nattributes.  If nfqa_parse_bridge() returns an error (e.g. NFQA_VLAN\npresent but NFQA_VLAN_TCI missing), the function returns immediately\nwithout freeing the dequeued entry or its sk_buff.\n\nThis leaks the nf_queue_entry, its associated sk_buff, and all held\nreferences (net_device refcounts, struct net refcount).  Repeated\ntriggering exhausts kernel memory.\n\nFix this by dropping the entry via nfqnl_reinject() with NF_DROP verdict\non the error path, consistent with other error handling in this file.","Type":"Description","Title":"netfilter: nfnetlink_queue: fix entry leak in bridge verdict err"}]}}}