{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "70f06c115bcca26ceeebf938e48bc8143668e38b"
            },
            {
              "fixed": "13b561c893c741635adce3781490a7a1099106c8"
            },
            {
              "fixed": "1d51aff78f078af1a80e9496c2f4643f4c0ef0a0"
            },
            {
              "fixed": "0c3d8fc87e10e38fe054ece009d6d1f66bef2cd4"
            },
            {
              "fixed": "16e088016f38cf728a0de709c3335cc5a3850476"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.97"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.40"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72430.json"
  },
  "details": "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-\u003eput_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-\u003ect.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-\u003ect.labels_used is never\nreleased.\n\nThe err: label is safe to reach from both sites: p-\u003etmpl is still NULL\nthere (kzalloc'd, not yet assigned) and nf_ct_put(NULL) is a no-op, so\nno inline release is needed.",
  "id": "CVE-2026-72430",
  "modified": "2026-08-18T03:30:58.766469559Z",
  "published": "2026-08-15T05:56:46.178Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0c3d8fc87e10e38fe054ece009d6d1f66bef2cd4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/13b561c893c741635adce3781490a7a1099106c8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/16e088016f38cf728a0de709c3335cc5a3850476"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1d51aff78f078af1a80e9496c2f4643f4c0ef0a0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72430.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72430"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "net/sched: act_ct: fix nf_connlabels leak on two error paths"
}