In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_hid: fix f_hidg lifetime vs cdev The embedded struct cdev does not have its lifetime correctly tied to the enclosing struct f_hidg, so there is a use-after-free if /dev/hidgN is held open while the gadget is deleted. This can readily be replicated with libusbgx's example programs (for conciseness - operating directly via configfs is equivalent): gadget-hid exec 3<> /dev/hidg0 gadget-vid-pid-remove exec 3<&- Pull the existing device up in to struct f_hidg and make use of the cdev_device_{add,del}() helpers. This changes the lifetime of the device object to match struct f_hidg, but note that it is still added and deleted at the same time.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

No data.

No data.

References
Link Providers
https://git.kernel.org/stable/c/1b6a53e447ec3d81623610c8c7ec5082b47dfdce cve-icon cve-icon
https://git.kernel.org/stable/c/1cd7f156f6389918f760687fbbf133c86da93162 cve-icon cve-icon
https://git.kernel.org/stable/c/89ff3dfac604614287ad5aad9370c3f984ea3f4b cve-icon cve-icon
https://git.kernel.org/stable/c/9e08b7f5fa00e9d550851352bd0d1ba74ccffef2 cve-icon cve-icon
https://git.kernel.org/stable/c/9e4b85d815b14bd4db2deea2a54264a23de8b896 cve-icon cve-icon
https://git.kernel.org/stable/c/c78c87c4e389b62f8892af7f59857447aa6d9797 cve-icon cve-icon
https://git.kernel.org/stable/c/d3136b79705c2e3bba9c76adc5628af0215d798e cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025102207-CVE-2022-50568-f109@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2022-50568 cve-icon
https://www.cve.org/CVERecord?id=CVE-2022-50568 cve-icon
History

Thu, 23 Oct 2025 10:30:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Vendors & Products Linux
Linux linux Kernel

Thu, 23 Oct 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Wed, 22 Oct 2025 13:45:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_hid: fix f_hidg lifetime vs cdev The embedded struct cdev does not have its lifetime correctly tied to the enclosing struct f_hidg, so there is a use-after-free if /dev/hidgN is held open while the gadget is deleted. This can readily be replicated with libusbgx's example programs (for conciseness - operating directly via configfs is equivalent): gadget-hid exec 3<> /dev/hidg0 gadget-vid-pid-remove exec 3<&- Pull the existing device up in to struct f_hidg and make use of the cdev_device_{add,del}() helpers. This changes the lifetime of the device object to match struct f_hidg, but note that it is still added and deleted at the same time.
Title usb: gadget: f_hid: fix f_hidg lifetime vs cdev
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2025-10-22T13:23:25.136Z

Updated: 2025-10-22T13:23:25.136Z

Reserved: 2025-10-22T13:20:23.760Z

Link: CVE-2022-50568

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-10-22T14:15:41.657

Modified: 2025-10-22T21:12:48.953

Link: CVE-2022-50568

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-10-22T00:00:00Z

Links: CVE-2022-50568 - Bugzilla