CVE-2025-68249
most: usb: hdm_probe: Fix calling put_device() before device initialization
Description
In the Linux kernel, the following vulnerability has been resolved: most: usb: hdm_probe: Fix calling put_device() before device initialization The early error path in hdm_probe() can jump to err_free_mdev before &mdev->dev has been initialized with device_initialize(). Calling put_device(&mdev->dev) there triggers a device core WARN and ends up invoking kref_put(&kobj->kref, kobject_release) on an uninitialized kobject. In this path the private struct was only kmalloc'ed and the intended release is effectively kfree(mdev) anyway, so free it directly instead of calling put_device() on an uninitialized device. This removes the WARNING and fixes the pre-initialization error path.
INFO
Published Date :
Dec. 16, 2025, 3:15 p.m.
Last Modified :
Dec. 16, 2025, 3:15 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Avoid calling put_device before device initialization.
- Free allocated memory directly in error paths.
- Ensure device is initialized before put_device.
- Update the Linux kernel to the latest version.
References to Advisories, Solutions, and Tools
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CVE-2025-68249.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-68249 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-68249
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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CVE-2025-68249 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
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Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Dec. 16, 2025
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: most: usb: hdm_probe: Fix calling put_device() before device initialization The early error path in hdm_probe() can jump to err_free_mdev before &mdev->dev has been initialized with device_initialize(). Calling put_device(&mdev->dev) there triggers a device core WARN and ends up invoking kref_put(&kobj->kref, kobject_release) on an uninitialized kobject. In this path the private struct was only kmalloc'ed and the intended release is effectively kfree(mdev) anyway, so free it directly instead of calling put_device() on an uninitialized device. This removes the WARNING and fixes the pre-initialization error path. Added Reference https://git.kernel.org/stable/c/3509c748e79435d09e730673c8c100b7f0ebc87c Added Reference https://git.kernel.org/stable/c/4af0eedbdb4df7936bf43a28e31af232744d2620 Added Reference https://git.kernel.org/stable/c/6fb8fbc0aa542af5bf0fed94fa6b0edf18144f95 Added Reference https://git.kernel.org/stable/c/7d851f746067b8ee5bac9c262f326ace0a6ea253 Added Reference https://git.kernel.org/stable/c/a8cc9e5fcb0e2eef21513a4fec888f5712cb8162 Added Reference https://git.kernel.org/stable/c/ad2be44882716dc3589fbc5572cc13f88ead6b24 Added Reference https://git.kernel.org/stable/c/c400410fe0580dd6118ae8d60287ac9ce71a65fd