GHSA-6GQM-WPJM-6GH5
Vulnerability from github – Published: 2026-01-13 18:31 – Updated: 2026-01-13 18:31In the Linux kernel, the following vulnerability has been resolved:
usb: phy: fsl-usb: Fix use-after-free in delayed work during device removal
The delayed work item otg_event is initialized in fsl_otg_conf() and scheduled under two conditions: 1. When a host controller binds to the OTG controller. 2. When the USB ID pin state changes (cable insertion/removal).
A race condition occurs when the device is removed via fsl_otg_remove(): the fsl_otg instance may be freed while the delayed work is still pending or executing. This leads to use-after-free when the work function fsl_otg_event() accesses the already freed memory.
The problematic scenario:
(detach thread) | (delayed work) fsl_otg_remove() | kfree(fsl_otg_dev) //FREE| fsl_otg_event() | og = container_of(...) //USE | og-> //USE
Fix this by calling disable_delayed_work_sync() in fsl_otg_remove() before deallocating the fsl_otg structure. This ensures the delayed work is properly canceled and completes execution prior to memory deallocation.
This bug was identified through static analysis.
{
"affected": [],
"aliases": [
"CVE-2025-68781"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-01-13T16:15:57Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: phy: fsl-usb: Fix use-after-free in delayed work during device removal\n\nThe delayed work item otg_event is initialized in fsl_otg_conf() and\nscheduled under two conditions:\n1. When a host controller binds to the OTG controller.\n2. When the USB ID pin state changes (cable insertion/removal).\n\nA race condition occurs when the device is removed via fsl_otg_remove():\nthe fsl_otg instance may be freed while the delayed work is still pending\nor executing. This leads to use-after-free when the work function\nfsl_otg_event() accesses the already freed memory.\n\nThe problematic scenario:\n\n(detach thread) | (delayed work)\nfsl_otg_remove() |\n kfree(fsl_otg_dev) //FREE| fsl_otg_event()\n | og = container_of(...) //USE\n | og-\u003e //USE\n\nFix this by calling disable_delayed_work_sync() in fsl_otg_remove()\nbefore deallocating the fsl_otg structure. This ensures the delayed work\nis properly canceled and completes execution prior to memory deallocation.\n\nThis bug was identified through static analysis.",
"id": "GHSA-6gqm-wpjm-6gh5",
"modified": "2026-01-13T18:31:03Z",
"published": "2026-01-13T18:31:03Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68781"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2e7c47e2eb3cfeadf78a1ccbac8492c60d508f23"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/319f7a85b3c4e34ac2fe083eb146fe129a556317"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/41ca62e3e21e48c2903b3b45e232cf4f2ff7434f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4476c73bbbb09b13a962176fca934b32d3954a2e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/69f9a0701abc3d1f8225074c56c27e6c16a37222"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
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|---|
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