{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43451", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:56.010Z", "datePublished": "2026-05-08T14:22:16.716Z", "dateUpdated": "2026-05-08T14:22:16.716Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-08T14:22:16.716Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netfilter/nfnetlink_queue.c"], "versions": [{"version": "8d45ff22f1b43249f0cf1baafe0262ca10d1666e", "lessThan": "a907bea273b60d3e604ec4e8e1f6c49954805794", "status": "affected", "versionType": "git"}, {"version": "8d45ff22f1b43249f0cf1baafe0262ca10d1666e", "lessThan": "0b18d1b834ab5a5009be70b530f978d7989e445b", "status": "affected", "versionType": "git"}, {"version": "8d45ff22f1b43249f0cf1baafe0262ca10d1666e", "lessThan": "b38d2b4603fd3dda24eb8b3dd81c18a0930be97b", "status": "affected", "versionType": "git"}, {"version": "8d45ff22f1b43249f0cf1baafe0262ca10d1666e", "lessThan": "47b1c5d1b0944aa88299f55a846fabaefc756982", "status": "affected", "versionType": "git"}, {"version": "8d45ff22f1b43249f0cf1baafe0262ca10d1666e", "lessThan": "cf4a4df38d1747e06fc54f9879bd7a6f4178032f", "status": "affected", "versionType": "git"}, {"version": "8d45ff22f1b43249f0cf1baafe0262ca10d1666e", "lessThan": "9853d94b82d303fc4ac37d592a23a154096ecd41", "status": "affected", "versionType": "git"}, {"version": "8d45ff22f1b43249f0cf1baafe0262ca10d1666e", "lessThan": "208669df703a25a601f45822b10c413f258bf275", "status": "affected", "versionType": "git"}, {"version": "8d45ff22f1b43249f0cf1baafe0262ca10d1666e", "lessThan": "f1ba83755d81c6fc66ac7acd723d238f974091e9", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netfilter/nfnetlink_queue.c"], "versions": [{"version": "4.7", "status": "affected"}, {"version": "0", "lessThan": "4.7", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.253", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.167", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.130", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.78", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.19", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.9", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "5.10.253"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "5.15.203"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "6.1.167"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "6.6.130"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "6.12.78"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "6.18.19"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "6.19.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "7.0"}]}]}], "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"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2026-43451", "lastModified": "2026-05-08T15:16:57.773", "metrics": {}, "published": "2026-05-08T15:16:57.773", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0b18d1b834ab5a5009be70b530f978d7989e445b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/208669df703a25a601f45822b10c413f258bf275"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/47b1c5d1b0944aa88299f55a846fabaefc756982"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9853d94b82d303fc4ac37d592a23a154096ecd41"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a907bea273b60d3e604ec4e8e1f6c49954805794"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b38d2b4603fd3dda24eb8b3dd81c18a0930be97b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cf4a4df38d1747e06fc54f9879bd7a6f4178032f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f1ba83755d81c6fc66ac7acd723d238f974091e9"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: netfilter: nfnetlink_queue: fix entry leak in bridge verdict error path", "id": "2468239", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2468239"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-772", "details": ["A flaw was found in the Linux kernel's netfilter component. A remote attacker can exploit this by sending specially crafted network packets that cause an error during VLAN attribute parsing in the nfnetlink_queue module. This leads to a memory leak, where kernel memory is not properly released. Repeated exploitation can exhaust kernel memory, resulting in a Denial of Service (DoS) for the system."], "name": "CVE-2026-43451", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43451\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43451\nhttps://lore.kernel.org/linux-cve-announce/2026050857-CVE-2026-43451-1195@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8d45ff22f1b43249f0cf1baafe0262ca10d1666e,a907bea273b60d3e604ec4e8e1f6c49954805794)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8d45ff22f1b43249f0cf1baafe0262ca10d1666e,47b1c5d1b0944aa88299f55a846fabaefc756982)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8d45ff22f1b43249f0cf1baafe0262ca10d1666e,b38d2b4603fd3dda24eb8b3dd81c18a0930be97b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8d45ff22f1b43249f0cf1baafe0262ca10d1666e,47b1c5d1b0944aa88299f55a846fabaefc756982)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8d45ff22f1b43249f0cf1baafe0262ca10d1666e,cf4a4df38d1747e06fc54f9879bd7a6f4178032f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8d45ff22f1b43249f0cf1baafe0262ca10d1666e,9853d94b82d303fc4ac37d592a23a154096ecd41)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8d45ff22f1b43249f0cf1baafe0262ca10d1666e,208669df703a25a601f45822b10c413f258bf275)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8d45ff22f1b43249f0cf1baafe0262ca10d1666e,f1ba83755d81c6fc66ac7acd723d238f974091e9)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.7"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.7)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.10.253,5.10.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.15.203,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.167,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.130,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.78,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.19,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.19.9,6.19.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-08T18:00:16.881570+00:00", "updated": "2026-05-09T16:30:37.781059+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}