Bug 2356592 (CVE-2025-21928) - CVE-2025-21928 kernel: HID: intel-ish-hid: Fix use-after-free issue in ishtp_hid_remove()
Summary: CVE-2025-21928 kernel: HID: intel-ish-hid: Fix use-after-free issue in ishtp_...
Keywords:
Status: NEW
Alias: CVE-2025-21928
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-04-01 16:01 UTC by OSIDB Bzimport
Modified: 2025-04-20 16:04 UTC (History)
4 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2025-04-01 16:01:30 UTC
In the Linux kernel, the following vulnerability has been resolved:

HID: intel-ish-hid: Fix use-after-free issue in ishtp_hid_remove()

The system can experience a random crash a few minutes after the driver is
removed. This issue occurs due to improper handling of memory freeing in
the ishtp_hid_remove() function.

The function currently frees the `driver_data` directly within the loop
that destroys the HID devices, which can lead to accessing freed memory.
Specifically, `hid_destroy_device()` uses `driver_data` when it calls
`hid_ishtp_set_feature()` to power off the sensor, so freeing
`driver_data` beforehand can result in accessing invalid memory.

This patch resolves the issue by storing the `driver_data` in a temporary
variable before calling `hid_destroy_device()`, and then freeing the
`driver_data` after the device is destroyed.


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