Bug 2356611 (CVE-2025-21923) - CVE-2025-21923 kernel: HID: hid-steam: Fix use-after-free when detaching device
Summary: CVE-2025-21923 kernel: HID: hid-steam: Fix use-after-free when detaching device
Keywords:
Status: NEW
Alias: CVE-2025-21923
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-04-01 16:02 UTC by OSIDB Bzimport
Modified: 2025-04-20 18:11 UTC (History)
4 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2025-04-01 16:02:24 UTC
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.


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