GHSA-CC38-6Q22-J4RM
Vulnerability from github – Published: 2026-02-04 18:30 – Updated: 2026-03-18 15:30In 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.
{
"affected": [],
"aliases": [
"CVE-2026-23080"
],
"database_specific": {
"cwe_ids": [
"CWE-401"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-02-04T17:16:18Z",
"severity": "MODERATE"
},
"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": "2026-03-18T15:30:39Z",
"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": [
{
"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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