Bug 2546513 (CVE-2026-98337)

Summary:	CVE-2026-98337 kernel: wifi: mac80211: don't start a ROC while scanning
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
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 Linux kernel's mac80211 wireless subsystem. A local user can cause a Denial of Service (DoS) or system instability by initiating a remain-on-channel (ROC) operation while a wireless network scan is concurrently active. This race condition leads to improper state handling and triggers kernel warnings, potentially disrupting system operations.	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 2026-10-06 09:37:01 UTC

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

wifi: mac80211: don't start a ROC while scanning

The ROC work can be pending when a scan starts (which requires
ROC list to be empty, but that's possible), and then a new ROC
can be added to the list and the work will pick it up.

Avoid starting that ROC if a scan made it between things, as
otherwise we'll hit a warning later:

  WARNING: net/mac80211/offchannel.c:404 at ieee80211_start_next_roc+0x256/0x2d0
  Workqueue: events_unbound cfg80211_wiphy_work
  Call Trace:
   __ieee80211_scan_completed+0x4fd/0xe40 net/mac80211/scan.c:537
   ieee80211_scan_work+0x472/0x1ff0 net/mac80211/scan.c:1193
   cfg80211_wiphy_work+0x410/0x570 net/wireless/core.c:513

Comment 1 gkamathe 2026-10-10 11:14:13 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98337.mbox