Bug 2546458 (CVE-2026-98336)

Summary: CVE-2026-98336 kernel: wifi: mac80211: don't offload TC setup on AP_VLAN interfaces
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: 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   
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Doc Text:
A flaw was found in the Linux kernel's mac80211 wireless networking subsystem. A local user with network administration privileges can cause a denial of service (DoS) by configuring hardware traffic control (TC) offloading on virtual Access Point Virtual Local Area Network (AP_VLAN) interfaces. Because these interfaces are purely virtual and lack hardware driver support, attempting to offload traffic control operations causes system instability and crashes the kernel.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-10-06 09:23:39 UTC
In the Linux kernel, the following vulnerability has been resolved:

wifi: mac80211: don't offload TC setup on AP_VLAN interfaces

AP_VLAN interfaces are purely virtual, so don't try to offload
TC setup to drivers. We can't really use the AP interface either
since we may not know it all the time, and it could technically
even change.

Just reject the TC offload so things get done in software.