netfilter: nf_tables: fix memory leak during stateful obj update

{
  "id": "adf2b3e872e4b036cb7200acbdba08e1547d5cc41a4ab314d4179212409f7adb",
  "url": "https://osv.dev/vulnerability/CVE-2022-48933",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "netfilter: nf_tables: fix memory leak during stateful obj update",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: fix memory leak during stateful obj update stateful objects can be updated from the control plane. The transaction logic allocates a temporary object for this purpose. The ->init function was called for this object, so plain kfree() leaks resources. We must call ->destroy function of the object. nft_obj_destroy does this, but it also decrements the module refcount, but the update path doesn't increment it. To avoid special-casing the update object release, do module_get for the update case too and release it via nft_obj_destroy().",
    "evidence": "osv:CVE-2022-48933",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.4.182",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.10.103",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.26",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.16.12",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-48933",
      "aliases": [
        "CVE-2022-48933"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "d62d0ba97b5803183e70cfded7f7b9da76893bf5"
                },
                {
                  "fixed": "53026346a94c43f35c32b18804041bc483271d87"
                },
                {
                  "fixed": "7e9880e81d3fd6a43c202f205717485290432826"
                },
                {
                  "fixed": "e96e204ee6fa46702f6c94c3c69a09e69e0eac52"
                },
                {
                  "fixed": "34bb90e407e3288f610558beaae54ecaa32b11c4"
                },
                {
                  "fixed": "dad3bdeef45f81a6e90204bcc85360bb76eccec7"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-48933.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.4.0"
                },
                {
                  "fixed": "5.4.182"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.5.0"
                },
                {
                  "fixed": "5.10.103"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.26"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "5.16.12"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-48933.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:50.923502611Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/34bb90e407e3288f610558beaae54ecaa32b11c4",
        "https://git.kernel.org/stable/c/53026346a94c43f35c32b18804041bc483271d87",
        "https://git.kernel.org/stable/c/7e9880e81d3fd6a43c202f205717485290432826",
        "https://git.kernel.org/stable/c/dad3bdeef45f81a6e90204bcc85360bb76eccec7",
        "https://git.kernel.org/stable/c/e96e204ee6fa46702f6c94c3c69a09e69e0eac52",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/48xxx/CVE-2022-48933.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-48933",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/48xxx/CVE-2022-48933.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-48933",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 519154,
  "published_at": "2024-08-22T03:31:27.165+00:00"
}