ghsa-5c2v-7jgp-gfhr
Vulnerability from github
Published
2024-07-12 15:31
Modified
2025-11-04 00:30
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details

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

net: bridge: mst: fix suspicious rcu usage in br_mst_set_state

I converted br_mst_set_state to RCU to avoid a vlan use-after-free but forgot to change the vlan group dereference helper. Switch to vlan group RCU deref helper to fix the suspicious rcu usage warning.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-40920"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-07-12T13:15:15Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bridge: mst: fix suspicious rcu usage in br_mst_set_state\n\nI converted br_mst_set_state to RCU to avoid a vlan use-after-free\nbut forgot to change the vlan group dereference helper. Switch to vlan\ngroup RCU deref helper to fix the suspicious rcu usage warning.",
  "id": "GHSA-5c2v-7jgp-gfhr",
  "modified": "2025-11-04T00:30:53Z",
  "published": "2024-07-12T15:31:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-40920"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/406bfc04b01ee47e4c626f77ecc7d9f85135b166"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/546ceb1dfdac866648ec959cbc71d9525bd73462"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7caefa2771722e65496d85b62e1dc4442b7d1345"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/caaa2129784a04dcade0ea92c12e6ff90bbd23d8"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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