Bug 2467103 (CVE-2026-43170)

Summary:	CVE-2026-43170 kernel: usb: dwc3: gadget: Move vbus draw to workqueue context
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	rhel-process-autobot, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the Linux kernel's USB DWC3 gadget driver. This vulnerability occurs when the `dwc3_gadget_vbus_draw()` function is called from an atomic context, which then invokes power management integrated circuit (PMIC) APIs that may cause the system to sleep. An attacker could exploit this condition to trigger a kernel panic, leading to a Denial of Service (DoS) on the affected system.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-05-06 13:04:26 UTC

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

usb: dwc3: gadget: Move vbus draw to workqueue context

Currently dwc3_gadget_vbus_draw() can be called from atomic
context, which in turn invokes power-supply-core APIs. And
some these PMIC APIs have operations that may sleep, leading
to kernel panic.

Fix this by moving the vbus_draw into a workqueue context.

Comment 1 Keith Grant 2026-05-06 19:51:19 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050635-CVE-2026-43170-01fa@gregkh/T