GHSA-MWJ5-HV79-WR7F

Vulnerability from github – Published: 2025-10-24 18:30 – Updated: 2025-10-24 18:30
VLAI?
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.

Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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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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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.