ghsa-mwj5-hv79-wr7f
Vulnerability from github
Published
2025-10-24 18:30
Modified
2025-10-24 18:30
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:

netfilter: conntrack: re-fetch conntrack after insertion

In case the conntrack is clashing, insertion can free skb->_nfct and set skb->_nfct to the already-confirmed entry.

This wasn't found before because the conntrack entry and the extension space used to free'd after an rcu grace period, plus the race needs events enabled to trigger.

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49561"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T07:01:31Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: conntrack: re-fetch conntrack after insertion\n\nIn case the conntrack is clashing, insertion can free skb-\u003e_nfct and\nset skb-\u003e_nfct to the already-confirmed entry.\n\nThis wasn\u0027t found before because the conntrack entry and the extension\nspace used to free\u0027d after an rcu grace period, plus the race needs\nevents enabled to trigger.",
  "id": "GHSA-mwj5-hv79-wr7f",
  "modified": "2025-10-24T18:30:56Z",
  "published": "2025-10-24T18:30:56Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49561"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/01989d7eebb61c99bd4b88ebc8e261bd2f02caed"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/04e4a11dc723c52db7a36dc58f0d69ce6426f8f0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/04f9e9104c969d8ce10a4a43634f641ed082092d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/56b14ecec97f39118bf85c9ac2438c5a949509ed"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/91a36ec160ec1a0c8f5352b772dffcbb0b6023e3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/92a999d1963eed0df666284e20055136ceabd12f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b16bb373988da3ceb0308381634117e18b6ec60d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e97222b785e70e8973281666d709baad6523d8af"
    }
  ],
  "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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