Bug 2516847 (CVE-2026-74412)

Summary:	CVE-2026-74412 kernel: wifi: rtw88: fix wrong pci_get_drvdata type in AER handlers
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:	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 `rtw88` Wi-Fi driver within the Linux kernel. This vulnerability arises from a type confusion during PCI Advanced Error Reporting (AER) handling, where a hardware-related pointer is mistakenly interpreted as a network device pointer. This misinterpretation causes the driver to perform operations on incorrect memory locations, leading to memory corruption. Such an issue can result in system instability or a denial of service.	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 2026-08-15 06:36:34 UTC

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

wifi: rtw88: fix wrong pci_get_drvdata type in AER handlers

rtw88 stores an ieee80211_hw pointer via pci_set_drvdata() at probe
time, but io_error_detected() and io_resume() retrieve it as a
net_device pointer.  This causes netif_device_detach/attach to
operate on an ieee80211_hw struct, reading and writing at wrong
offsets.

Use ieee80211_stop_queues/wake_queues instead, consistent with
every other queue stop/start path in the driver.

Comment 1 Keith Grant 2026-08-20 21:36:57 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081511-CVE-2026-74412-513f@gregkh/T