{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-72430",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-09T03:40:39.928Z",
        "datePublished": "2026-08-15T05:56:46.178Z",
        "dateUpdated": "2026-08-17T05:14:29.962Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-17T05:14:29.962Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_ct: fix nf_connlabels leak on two error paths\n\ntcf_ct_fill_params() calls nf_connlabels_get() (setting put_labels) when\nTCA_CT_LABELS is present, but two later error sites use a bare return\ninstead of \"goto err\", skipping the err: nf_connlabels_put() cleanup.\nThey also precede the \"p->put_labels = put_labels\" assignment, so the\ntcf_ct_params_free() fallback does not release the count either. Each\nfailed RTM_NEWACTION on these paths leaks one nf_connlabels reference:\nnet->ct.labels_used is incremented and never released. The action is\nreachable with CAP_NET_ADMIN over the netns, i.e. from an unprivileged\nuser namespace on default-userns kernels.\n\nImpact: an unprivileged user with CAP_NET_ADMIN over a network namespace\n(e.g. via user namespaces) leaks one nf_connlabels reference per failed\nRTM_NEWACTION on the two error paths; net->ct.labels_used is never\nreleased.\n\nThe err: label is safe to reach from both sites: p->tmpl is still NULL\nthere (kzalloc'd, not yet assigned) and nf_ct_put(NULL) is a no-op, so\nno inline release is needed."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/sched/act_ct.c"
                    ],
                    "versions": [
                        {
                            "version": "70f06c115bcca26ceeebf938e48bc8143668e38b",
                            "lessThan": "13b561c893c741635adce3781490a7a1099106c8",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "70f06c115bcca26ceeebf938e48bc8143668e38b",
                            "lessThan": "1d51aff78f078af1a80e9496c2f4643f4c0ef0a0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "70f06c115bcca26ceeebf938e48bc8143668e38b",
                            "lessThan": "0c3d8fc87e10e38fe054ece009d6d1f66bef2cd4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "70f06c115bcca26ceeebf938e48bc8143668e38b",
                            "lessThan": "16e088016f38cf728a0de709c3335cc5a3850476",
                            "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/sched/act_ct.c"
                    ],
                    "versions": [
                        {
                            "version": "6.7",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.7",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.97",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.40",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.5",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "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": "6.7",
                                    "versionEndExcluding": "6.12.97"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.7",
                                    "versionEndExcluding": "6.18.40"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.7",
                                    "versionEndExcluding": "7.1.5"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.7",
                                    "versionEndExcluding": "7.2"
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/13b561c893c741635adce3781490a7a1099106c8"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1d51aff78f078af1a80e9496c2f4643f4c0ef0a0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0c3d8fc87e10e38fe054ece009d6d1f66bef2cd4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/16e088016f38cf728a0de709c3335cc5a3850476"
                }
            ],
            "title": "net/sched: act_ct: fix nf_connlabels leak on two error paths",
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}