ghsa-pj7v-5fgv-5fg6
Vulnerability from github
Published
2025-07-04 15:31
Modified
2025-07-04 15:31
Details

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

atm: Revert atm_account_tx() if copy_from_iter_full() fails.

In vcc_sendmsg(), we account skb->truesize to sk->sk_wmem_alloc by atm_account_tx().

It is expected to be reverted by atm_pop_raw() later called by vcc->dev->ops->send(vcc, skb).

However, vcc_sendmsg() misses the same revert when copy_from_iter_full() fails, and then we will leak a socket.

Let's factorise the revert part as atm_return_tx() and call it in the failure path.

Note that the corresponding sk_wmem_alloc operation can be found in alloc_tx() as of the blamed commit.

$ git blame -L:alloc_tx net/atm/common.c c55fa3cccbc2c~

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{
  "affected": [],
  "aliases": [
    "CVE-2025-38190"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-07-04T14:15:26Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\natm: Revert atm_account_tx() if copy_from_iter_full() fails.\n\nIn vcc_sendmsg(), we account skb-\u003etruesize to sk-\u003esk_wmem_alloc by\natm_account_tx().\n\nIt is expected to be reverted by atm_pop_raw() later called by\nvcc-\u003edev-\u003eops-\u003esend(vcc, skb).\n\nHowever, vcc_sendmsg() misses the same revert when copy_from_iter_full()\nfails, and then we will leak a socket.\n\nLet\u0027s factorise the revert part as atm_return_tx() and call it in\nthe failure path.\n\nNote that the corresponding sk_wmem_alloc operation can be found in\nalloc_tx() as of the blamed commit.\n\n  $ git blame -L:alloc_tx net/atm/common.c c55fa3cccbc2c~",
  "id": "GHSA-pj7v-5fgv-5fg6",
  "modified": "2025-07-04T15:31:09Z",
  "published": "2025-07-04T15:31:09Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38190"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2252c539c43f9a1431a7e8b34e3c18e9dd77a96d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/287b4f085d2ca3375cf1ee672af27410c64777e8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3902205eadf35db59dbc2186c2a98b9e6182efa5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3d828519bd69bfcaabdd942a872679617ef06739"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5e0d00992118e234ebf29d5145c1cc920342777e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7851263998d4269125fd6cb3fdbfc7c6db853859"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7d6bc28cfe5c8e3a279b4b4bdeed6698b2702685"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c12430edd92fd49a4800b0f3fb395b50cb16bcc1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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