Bug 2536777 (CVE-2026-90365)

Summary:	CVE-2026-90365 kernel: wifi: mt76: cancel reset and rc work on device unregister
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:	akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, 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 `mt76` Wi-Fi driver in the Linux kernel. During device unregistration, certain work items (`reset_work` and `rc_work`) were not properly cancelled. This oversight could allow these work items to execute on an unregistered hardware, potentially leading to unexpected behavior, resource access issues, and overall system instability or a denial of service (DoS).	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 2026-09-17 19:32:48 UTC

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

wifi: mt76: cancel reset and rc work on device unregister

Both drivers cancelled dump_work on unregister but left reset_work and
rc_work to be flushed only by destroy_workqueue() in mt76_free_device(),
which runs after the hw is unregistered and the hardware stopped. A
reset_work that fires in that window calls ieee80211_restart_hw() and
re-arms mac_work on an unregistered hw, and rc_work touches station state
being torn down. Cancel both up front, alongside dump_work.

Comment 1 gkamathe 2026-09-22 07:51:15 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90365.mbox