ghsa-677p-h2hj-9j82
Vulnerability from github
Published
2025-04-17 18:31
Modified
2025-04-17 21:31
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:

can: vxcan: vxcan_xmit: fix use after free bug

After calling netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the canfd_frame cfd which aliases skb memory is accessed after the netif_rx_ni().

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47669"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-04-17T18:15:43Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: vxcan: vxcan_xmit: fix use after free bug\n\nAfter calling netif_rx_ni(skb), dereferencing skb is unsafe.\nEspecially, the canfd_frame cfd which aliases skb memory is accessed\nafter the netif_rx_ni().",
  "id": "GHSA-677p-h2hj-9j82",
  "modified": "2025-04-17T21:31:04Z",
  "published": "2025-04-17T18:31:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47669"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/75854cad5d80976f6ea0f0431f8cedd3bcc475cb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9b820875a32a3443d67bfd368e93038354e98052"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a24476b37167816e6352ca1a2cf3769847774f70"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e771a874076115df8bff27d325edfd2340e4ec69"
    }
  ],
  "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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