CVE-2025-21838

usb: gadget: core: flush gadget workqueue after device removal

Published Mar 7, 2025 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

Description

In the Linux kernel, the following vulnerability has been resolved:

usb: gadget: core: flush gadget workqueue after device removal

device_del() can lead to new work being scheduled in gadget->work
workqueue. This is observed, for example, with the dwc3 driver with the
following call stack:
device_del()
gadget_unbind_driver()
usb_gadget_disconnect_locked()
dwc3_gadget_pullup()
dwc3_gadget_soft_disconnect()
usb_gadget_set_state()
schedule_work(&gadget->work)

Move flush_work() after device_del() to ensure the workqueue is cleaned
up.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`5702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15`	affected	< e3bc1a9a67ce33a2e761e6e7b7c2afc6cb9b7266
`5702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15`	affected	< 859cb45aefa6de823b2fa7f229fe6d9562c9f3b7
`5702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15`	affected	< f894448f3904d7ad66fecef8f01fe0172629e091
`5702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15`	affected	< 97695b5a1b5467a4f91194db12160f56da445dfe
`5702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15`	affected	< 399a45e5237ca14037120b1b895bd38a3b4492ea

Linux

affected

Version	Status	Constraints
`3.12`	affected	—
`0`	unaffected	< 3.12
`6.1.130`	unaffected	≤ 6.1.*
`6.6.80`	unaffected	≤ 6.6.*
`6.12.16`	unaffected	≤ 6.12.*
`6.13.4`	unaffected	≤ 6.13.*
`6.14`	unaffected	≤ *

Configuration 1 [-]

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:6.14:rc1::::::
	cpe:2.3:o:linux:linux_kernel:6.14:rc2::::::

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

Source	ID	Title
Debian DLA	DLA-4193-1	linux-6.1 security update
Debian DSA	DSA-5900-1	linux security update
EUVD	EUVD-2025-7589	In the Linux kernel, the following vulnerability has been resolved: usb: gadget: core: flush gadget workqueue after device removal device_del() can lead to new work being scheduled in gadget->work workqueue. This is observed, for example, with the dwc3 driver with the following call stack: device_del() gadget_unbind_driver() usb_gadget_disconnect_locked() dwc3_gadget_pullup() dwc3_gadget_soft_disconnect() usb_gadget_set_state() schedule_work(&gadget->work) Move flush_work() after device_del() to ensure the workqueue is cleaned up.
Ubuntu USN	USN-7521-1	Linux kernel vulnerabilities
Ubuntu USN	USN-7521-2	Linux kernel (AWS) vulnerabilities
Ubuntu USN	USN-7521-3	Linux kernel vulnerabilities
Ubuntu USN	USN-7703-1	Linux kernel vulnerabilities
Ubuntu USN	USN-7703-2	Linux kernel vulnerabilities
Ubuntu USN	USN-7703-3	Linux kernel (Oracle) vulnerabilities
Ubuntu USN	USN-7703-4	Linux kernel vulnerabilities
Ubuntu USN	USN-7719-1	Linux kernel (Raspberry Pi Real-time) vulnerabilities
Ubuntu USN	USN-7737-1	Linux kernel (Azure) vulnerabilities

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.

Exploit prediction score: < 1% (0.208% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://cert-portal.siemens.com/productcert/html/ssa-784472.html
https://git.kernel.org/stable/c/399a45e5237ca14037120b1b895bd38a3b4492ea
https://git.kernel.org/stable/c/859cb45aefa6de823b2fa7f229fe6d9562c9f3b7
https://git.kernel.org/stable/c/97695b5a1b5467a4f91194db12160f56da445dfe
https://git.kernel.org/stable/c/e3bc1a9a67ce33a2e761e6e7b7c2afc6cb9b7266
https://git.kernel.org/stable/c/f894448f3904d7ad66fecef8f01fe0172629e091
https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
https://lore.kernel.org/linux-cve-announce/2025030706-CVE-2025-21838-5ade@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2025-21838
https://www.cve.org/CVERecord?id=CVE-2025-21838

History

Nov 6, 2026 7:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Oct 15, 2026 2:30 AM Added references View changes

Type	Values Removed	Values Added
References		https://cert-portal.siemens.com/productcert/html/ssa-784472.html

Nov 3, 2025 8:30 PM Added references View changes

Type	Values Removed	Values Added
References		https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html

Oct 29, 2025 9:00 PM First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Scoring metrics updated View changes

Type	Values Removed	Values Added
First Time appeared		Linux Linux linux Kernel
Weaknesses		NVD-CWE-noinfo
CPEs		cpe:2.3:o:linux:linux_kernel:::::::: cpe:2.3:o:linux:linux_kernel:6.14:rc1:::::: cpe:2.3:o:linux:linux_kernel:6.14:rc2::::::
Vendors & Products		Linux Linux linux Kernel
Metrics	cvssV3_1 `{'score': 6.0, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H'}`	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'}`

Mar 27, 2025 3:30 PM Weaknesses updated. Scoring metrics updated View changes

Type	Values Removed	Values Added
Weaknesses		CWE-416
Metrics	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 `Low`	cvssV3_1 `{'score': 6.0, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H'}` threat_severity `Moderate`

Mar 8, 2025 2:00 PM Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
References		https://lore.kernel.org/linux-cve-announce/2025030706-CVE-2025-21838-5ade@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2025-21838 https://www.cve.org/CVERecord?id=CVE-2025-21838
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 `Low`

Mar 7, 2025 6:15 PM Added references View changes

Type	Values Removed	Values Added
References		https://git.kernel.org/stable/c/e3bc1a9a67ce33a2e761e6e7b7c2afc6cb9b7266

Mar 7, 2025 9:15 AM Description updated. Title updated. Added references View changes

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: usb: gadget: core: flush gadget workqueue after device removal device_del() can lead to new work being scheduled in gadget->work workqueue. This is observed, for example, with the dwc3 driver with the following call stack: device_del() gadget_unbind_driver() usb_gadget_disconnect_locked() dwc3_gadget_pullup() dwc3_gadget_soft_disconnect() usb_gadget_set_state() schedule_work(&gadget->work) Move flush_work() after device_del() to ensure the workqueue is cleaned up.
Title		usb: gadget: core: flush gadget workqueue after device removal
References		https://git.kernel.org/stable/c/399a45e5237ca14037120b1b895bd38a3b4492ea https://git.kernel.org/stable/c/859cb45aefa6de823b2fa7f229fe6d9562c9f3b7 https://git.kernel.org/stable/c/97695b5a1b5467a4f91194db12160f56da445dfe https://git.kernel.org/stable/c/f894448f3904d7ad66fecef8f01fe0172629e091