Bug 2461546 (CVE-2026-31672)

Summary:	CVE-2026-31672 kernel: wifi: rt2x00usb: fix devres lifetime
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 rt2x00usb component, which handles Wi-Fi USB devices. This issue stems from improper management of system memory allocated for USB devices. When a Wi-Fi USB device driver is unloaded without the device being physically disconnected, the system may fail to release the allocated memory, leading to a memory leak. Over time, this could exhaust system resources, potentially causing a Denial of Service (DoS) where the system becomes unresponsive or crashes.	Story Points:	---
Clone Of:		Environment:
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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 2026-04-24 15:07:46 UTC

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

wifi: rt2x00usb: fix devres lifetime

USB drivers bind to USB interfaces and any device managed resources
should have their lifetime tied to the interface rather than parent USB
device. This avoids issues like memory leaks when drivers are unbound
without their devices being physically disconnected (e.g. on probe
deferral or configuration changes).

Fix the USB anchor lifetime so that it is released on driver unbind.

Comment 1 Keith Grant 2026-04-24 22:42:27 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026042407-CVE-2026-31672-e116@gregkh/T