usb: typec: ucsi: ccg: Fix use-after-free of ucsi on remove

{
  "id": "710509ccf91e35901df007ef38ee9103a436dfab5e7163802cc574b75477a9cc",
  "url": "https://osv.dev/vulnerability/CVE-2026-64329",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "usb: typec: ucsi: ccg: Fix use-after-free of ucsi on remove",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: ccg: Fix use-after-free of ucsi on remove The threaded IRQ handler ccg_irq_handler() calls ucsi_notify_common(), which on a connector-change event calls ucsi_connector_change() and schedules connector work. In ucsi_ccg_remove(), ucsi_destroy() frees uc->ucsi (kfree) before free_irq() is called, so a handler invocation already in flight may access the freed object after ucsi_destroy(). CPU 0 (remove) | CPU 1 (threaded IRQ) ucsi_destroy(uc->ucsi) | ccg_irq_handler() kfree(ucsi) // FREE | ucsi_notify_common(uc->ucsi) // USE Move free_irq() before ucsi_destroy() in the remove path. It is kept after ucsi_unregister(): ucsi_unregister() cancels connector work whose handler issues GET_CONNECTOR_STATUS through ucsi_send_command_common(), which waits for a completion that is signalled from the IRQ handler, so the IRQ must stay active until that work has been cancelled. The probe error path already orders free_irq() before ucsi_destroy(). This bug was found by static analysis.",
    "evidence": "osv:CVE-2026-64329",
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    "severity": "unknown",
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      "modified": "2026-10-28T02:30:49.996725502Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1a160076d3d0dcd4a98a4599ad96eec0790b099b",
        "https://git.kernel.org/stable/c/1f0bdc2884b67de337215079bba166df0cdf4ac5",
        "https://git.kernel.org/stable/c/86c9ee928c4a370e323e432aaf8dca79c4ba7c85",
        "https://git.kernel.org/stable/c/99381e762273a2410a3f0216000be32b013c0ea9",
        "https://git.kernel.org/stable/c/c32df11147822d22facee8fa30c2e8971d12f426",
        "https://git.kernel.org/stable/c/dbb500bad02146b388041877574829016591ddc8",
        "https://git.kernel.org/stable/c/f1adeb1ff8bef1467d6961059810795d02bbad5d",
        "https://git.kernel.org/stable/c/f5c772b76bbd95de8be51cf849c6098f6af6fcf9",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64329.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-64329",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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    "security_relevant": true,
    "severity_evidence": null
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  "source_id": "core-osv",
  "document_id": 518179,
  "published_at": "2026-07-25T08:49:57.098+00:00"
}