HID: hid-lenovo-go: cancel cfg_setup work in hid_go_cfg_remove()
hid_go_cfg_probe() initialises drvdata.go_cfg_setup and schedules it
to run 2 ms later:
INIT_DELAYED_WORK(&drvdata.go_cfg_setup, &cfg_setup);
schedule_delayed_work(&drvdata.go_cfg_setup, msecs_to_jiffies(2));
cfg_setup() dereferences drvdata.hdev to issue MCU command requests.
hid_go_cfg_remove() tears down sysfs and stops the HID device, but
never drains the delayed work. If the device is unbound within the
2 ms scheduling delay (a probe failure rolling back via remove, or a
fast rmmod after probe), the work fires after hid_destroy_device()
has dropped its reference and released the underlying hdev struct,
leaving cfg_setup() with a stale drvdata.hdev pointer.
Mirror the sibling driver hid-lenovo-go-s.c, whose hid_gos_cfg_remove()
already calls cancel_delayed_work_sync() on its analogous work, and
drain go_cfg_setup at the top of hid_go_cfg_remove(). The cancel
must come before guard(mutex)(&drvdata.cfg_mutex) because cfg_setup()
acquires that mutex; reversing the order would deadlock.
Analysis
Analysis and contextual insights are available on OpenCVE Cloud.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux | unaffected |
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| Linux | Linux | affected |
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Thu, 06 Aug 2026 07:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | In the Linux kernel, the following vulnerability has been resolved: HID: hid-lenovo-go: cancel cfg_setup work in hid_go_cfg_remove() hid_go_cfg_probe() initialises drvdata.go_cfg_setup and schedules it to run 2 ms later: INIT_DELAYED_WORK(&drvdata.go_cfg_setup, &cfg_setup); schedule_delayed_work(&drvdata.go_cfg_setup, msecs_to_jiffies(2)); cfg_setup() dereferences drvdata.hdev to issue MCU command requests. hid_go_cfg_remove() tears down sysfs and stops the HID device, but never drains the delayed work. If the device is unbound within the 2 ms scheduling delay (a probe failure rolling back via remove, or a fast rmmod after probe), the work fires after hid_destroy_device() has dropped its reference and released the underlying hdev struct, leaving cfg_setup() with a stale drvdata.hdev pointer. Mirror the sibling driver hid-lenovo-go-s.c, whose hid_gos_cfg_remove() already calls cancel_delayed_work_sync() on its analogous work, and drain go_cfg_setup at the top of hid_go_cfg_remove(). The cancel must come before guard(mutex)(&drvdata.cfg_mutex) because cfg_setup() acquires that mutex; reversing the order would deadlock. | |
| Title | HID: hid-lenovo-go: cancel cfg_setup work in hid_go_cfg_remove() | |
| First Time appeared |
Linux
Linux linux Kernel |
|
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Linux
Linux linux Kernel |
|
| References |
|
MITRE
Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2026-08-06T07:13:50.918Z
Reserved: 2026-07-19T15:36:31.799Z
Link: CVE-2026-64595
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
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No weakness.