CVE-2025-21923: HID: hid-steam: Fix use-after-free when detaching device
First published: Tue Apr 01 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: HID: hid-steam: Fix use-after-free when detaching device When a hid-steam device is removed it must clean up the client_hdev used for intercepting hidraw access. This can lead to scheduling deferred work to reattach the input device. Though the cleanup cancels the deferred work, this was done before the client_hdev itself is cleaned up, so it gets rescheduled. This patch fixes the ordering to make sure the deferred work is properly canceled.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| Linux Kernel | >=6.6.79<6.6.83 | |
| Linux Kernel | >=6.12.16<6.12.19 | |
| Linux Kernel | >=6.13.4<6.13.7 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2025-21923?
CVE-2025-21923 has been assigned a medium severity rating due to the potential for a use-after-free vulnerability leading to unexpected behavior.
How do I fix CVE-2025-21923?
To fix CVE-2025-21923, ensure your Linux Kernel is updated to the latest version that includes the patch addressing this vulnerability.
What systems are affected by CVE-2025-21923?
CVE-2025-21923 affects the Linux Kernel, specifically concerning the hid-steam device driver.
Can CVE-2025-21923 be exploited remotely?
CVE-2025-21923 cannot be exploited remotely as it requires physical access to the system to detach the device.
What are the consequences of CVE-2025-21923 if exploited?
Exploiting CVE-2025-21923 could lead to arbitrary code execution or denial of service due to the use-after-free error.
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