ghsa-h8cc-85qr-g7ff
Vulnerability from github
Published
2025-03-17 21:30
Modified
2025-03-17 21:30
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

In the Linux kernel, the following vulnerability has been resolved:

net/sched: act_ct: fix ref leak when switching zones

When switching zones or network namespaces without doing a ct clear in between, it is now leaking a reference to the old ct entry. That's because tcf_ct_skb_nfct_cached() returns false and tcf_ct_flow_table_lookup() may simply overwrite it.

The fix is to, as the ct entry is not reusable, free it already at tcf_ct_skb_nfct_cached().

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49183"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T07:00:55Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_ct: fix ref leak when switching zones\n\nWhen switching zones or network namespaces without doing a ct clear in\nbetween, it is now leaking a reference to the old ct entry. That\u0027s\nbecause tcf_ct_skb_nfct_cached() returns false and\ntcf_ct_flow_table_lookup() may simply overwrite it.\n\nThe fix is to, as the ct entry is not reusable, free it already at\ntcf_ct_skb_nfct_cached().",
  "id": "GHSA-h8cc-85qr-g7ff",
  "modified": "2025-03-17T21:30:31Z",
  "published": "2025-03-17T21:30:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49183"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4bb42d73def9411e5cad885b9811987d72431df1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b24793a37d91aacad7cb9893b226a7924a89636a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bcb74e132a76ce0502bb33d5b65533a4ed72d159"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bcbf4e5c3b5b373cd61528392dd1ec8e9c0fd33d"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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