Bug 2546435 (CVE-2026-98195)

Summary:	CVE-2026-98195 kernel: wifi: iwlegacy: fix broadcast stations deallocation
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
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 Linux kernel's iwlegacy wireless driver. This flaw allows a local user to cause a Denial of Service (DoS) by toggling the radio frequency kill (RF_KILL) switch during driver initialization. Improper state tracking in the error-handling path leads to the duplicate deallocation of broadcast station resources, potentially crashing the 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 2026-10-06 09:20:25 UTC

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

wifi: iwlegacy: fix broadcast stations deallocation

On the error path of __il4965_up(), il_dealloc_bcast_stations() clears
only IL_STA_UCODE_ACTIVE, leaving IL_STA_BCAST set. This causes the
same broadcast stations to be deallocated again by __il4965_down().

This can occur when RF_KILL is toggled during driver startup.

To fix clear the entire 'used' field, since we will not do any
other operations on the station.

Comment 1 Mauro Matteo Cascella 2026-10-08 17:46:15 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98195.mbox