Bug 2464352 (CVE-2026-43052)

Summary:	CVE-2026-43052 kernel: wifi: mac80211: check tdls flag in ieee80211_tdls_oper
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 mac80211 wireless stack. For `NL80211_TDLS_ENABLE_LINK`, the driver verified that a station exists but not that it was an actual TDLS peer, so TDLS-specific side effects could run for ordinary stations and disturb channel context and HT protection before the operation ultimately failed. Upstream adds an early `sta->sta.tdls` check so only true TDLS peers proceed.	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 2026-05-01 15:01:47 UTC

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

wifi: mac80211: check tdls flag in ieee80211_tdls_oper

When NL80211_TDLS_ENABLE_LINK is called, the code only checks if the
station exists but not whether it is actually a TDLS station. This
allows the operation to proceed for non-TDLS stations, causing
unintended side effects like modifying channel context and HT
protection before failing.

Add a check for sta->sta.tdls early in the ENABLE_LINK case, before
any side effects occur, to ensure the operation is only allowed for
actual TDLS peers.

Comment 1 Keith Grant 2026-05-01 18:47:44 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050107-CVE-2026-43052-10fe@gregkh/T