CVE-2025-21928

Published: April 3, 2025Last modified: April 3, 2025

Description

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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References

• https://git.kernel.org/stable/c/01b18a330cda61cc21423a7d1af92cf31ded8f60
• https://git.kernel.org/stable/c/07583a0010696a17fb0942e0b499a62785c5fc9f
• https://git.kernel.org/stable/c/0c1fb475ef999d6c22fc3f963fdf20cb3ed1b03d
• https://git.kernel.org/stable/c/560f4d1299342504a6ab8a47f575b5e6b8345ada
• https://git.kernel.org/stable/c/cf1a6015d2f6b1f0afaa0fd6a0124ff2c7943394
• https://git.kernel.org/stable/c/d3faae7f42181865c799d88c5054176f38ae4625
• https://git.kernel.org/stable/c/dea6a349bcaf243fff95dfd0428a26be6a0fb44e
• https://git.kernel.org/stable/c/eb0695d87a81e7c1f0509b7d8ee7c65fbc26aec9