GHSA-CC38-6Q22-J4RM

Vulnerability from github – Published: 2026-02-04 18:30 – Updated: 2026-02-06 18:30
VLAI?
Details

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

can: mcba_usb: mcba_usb_read_bulk_callback(): fix URB memory leak

Fix similar memory leak as in commit 7352e1d5932a ("can: gs_usb: gs_usb_receive_bulk_callback(): fix URB memory leak").

In mcba_usb_probe() -> mcba_usb_start(), the URBs for USB-in transfers are allocated, added to the priv->rx_submitted anchor and submitted. In the complete callback mcba_usb_read_bulk_callback(), the URBs are processed and resubmitted. In mcba_usb_close() -> mcba_urb_unlink() the URBs are freed by calling usb_kill_anchored_urbs(&priv->rx_submitted).

However, this does not take into account that the USB framework unanchors the URB before the complete function is called. This means that once an in-URB has been completed, it is no longer anchored and is ultimately not released in usb_kill_anchored_urbs().

Fix the memory leak by anchoring the URB in the mcba_usb_read_bulk_callback()to the priv->rx_submitted anchor.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-23080"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-02-04T17:16:18Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: mcba_usb: mcba_usb_read_bulk_callback(): fix URB memory leak\n\nFix similar memory leak as in commit 7352e1d5932a (\"can: gs_usb:\ngs_usb_receive_bulk_callback(): fix URB memory leak\").\n\nIn mcba_usb_probe() -\u003e mcba_usb_start(), the URBs for USB-in transfers are\nallocated, added to the priv-\u003erx_submitted anchor and submitted. In the\ncomplete callback mcba_usb_read_bulk_callback(), the URBs are processed and\nresubmitted. In mcba_usb_close() -\u003e mcba_urb_unlink() the URBs are freed by\ncalling usb_kill_anchored_urbs(\u0026priv-\u003erx_submitted).\n\nHowever, this does not take into account that the USB framework unanchors\nthe URB before the complete function is called. This means that once an\nin-URB has been completed, it is no longer anchored and is ultimately not\nreleased in usb_kill_anchored_urbs().\n\nFix the memory leak by anchoring the URB in the\nmcba_usb_read_bulk_callback()to the priv-\u003erx_submitted anchor.",
  "id": "GHSA-cc38-6q22-j4rm",
  "modified": "2026-02-06T18:30:30Z",
  "published": "2026-02-04T18:30:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23080"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/179f6f0cf5ae489743273b7c1644324c0c477ea9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/59153b6388e05609144ad56a9b354e9100a91983"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/710a7529fb13c5a470258ff5508ed3c498d54729"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8b34c611a4feb81921bc4728c091e4e3ba0270c0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/94c9f6f7b953f6382fef4bdc48c046b861b8868f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b5a1ccdc63b71d93a69a6b72f7a3f3934293ea60"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d374d715e338dfc3804aaa006fa6e470ffebb264"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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