In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: validate extension-frame layout before RX
Extension frames only have the extension header at the regular 802.11 header offset. The generic RX path can still reach helpers and interface dispatch code that read regular header address fields before unsupported extension subtypes are dropped.
mac80211 currently only handles S1G beacon extension frames. Drop other extension subtypes before they can reach regular-header RX processing. For S1G beacons, linearize the SKB with the management-frame path and require the fixed S1G beacon header, including optional fixed fields indicated by frame control, before generic RX dispatch.
Route S1G beacons through the station/default-link RX path without regular-header station lookup. Avoid regular-header address reads in the mac80211 RX paths that process S1G extension beacons, including accept-frame, duplicate-detection, address-copy, and MLO address-translation paths.
Also make ieee80211_get_bssid() length-safe before returning the S1G source-address pointer.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Redhat_linux | — | No solution exists | Aug 19, 2026 | Aug 15, 2026 |
| Ubuntu | — | Upgrade linux-image-azure-fde-7.0Upgrade linux-image-7.0.0-38-generic-64kUpgrade linux-image-7.0.0-38-realtimeUpgrade linux-image-gcp-64kUpgrade linux-image-azure-fdeUpgrade linux-image-7.0.0-1015-oemUpgrade linux-image-7.0.0-1014-gcp-64kUpgrade linux-image-7.0.0-38-genericUpgrade linux-image-nvidia-tegraUpgrade linux-image-nvidia-tegra-6.8Upgrade linux-image-oem-26.04aUpgrade linux-image-7.0.0-1017-azureUpgrade linux-image-gke-64k-7.0Upgrade linux-image-azureUpgrade linux-image-7.0.0-1016-azure-fdeUpgrade linux-image-generic-64kUpgrade linux-image-generic-64k-7.0Upgrade linux-image-oracle-64kUpgrade linux-image-7.0.0-1015-ibmUpgrade linux-image-virtual-hwe-26.04Upgrade linux-image-oracle-7.0Upgrade linux-image-6.8.0-1035-nvidia-tegraUpgrade linux-image-gke-64kUpgrade linux-image-7.0.0-1014-awsUpgrade linux-image-7.0.0-1013-oracleUpgrade linux-image-ibm-7.0Upgrade linux-image-genericUpgrade linux-image-7.0.0-1008-gke-64kUpgrade linux-image-realtime-hwe-26.04Upgrade linux-image-7.0.0-1013-oracle-64kUpgrade linux-image-nvidia-tegra-rtUpgrade linux-image-azure-lts-26.04Upgrade linux-image-oem-26.04Upgrade linux-image-ibmUpgrade linux-image-aws-64k-7.0Upgrade linux-image-7.0.0-1008-gkeUpgrade linux-image-realtimeUpgrade linux-image-gke-64k-hwe-26.04Upgrade linux-image-nvidia-tegra-rt-6.8Upgrade linux-image-generic-7.0Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-oracleUpgrade linux-image-gkeUpgrade linux-image-awsUpgrade linux-image-7.0.0-1014-gcpUpgrade linux-image-realtime-64k-7.0Upgrade linux-image-generic-hwe-24.04Upgrade linux-image-7.0.0-1014-aws-64kUpgrade linux-image-virtualUpgrade linux-image-gcp-64k-7.0No solution existsUpgrade linux-image-gcp-7.0Upgrade linux-image-7.0.0-38-realtime-64kUpgrade linux-image-azure-fde-lts-26.04Upgrade linux-image-oracle-64k-7.0Upgrade linux-image-oem-7.0Upgrade linux-image-generic-hwe-26.04Upgrade linux-image-realtime-64kUpgrade linux-image-gcpUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-virtual-7.0Upgrade linux-image-aws-7.0Upgrade linux-image-aws-64kUpgrade linux-image-6.8.0-1035-nvidia-tegra-rtUpgrade linux-image-realtime-7.0Upgrade linux-image-gke-hwe-26.04Upgrade linux-image-azure-7.0Upgrade linux-image-realtime-64k-hwe-26.04Upgrade linux-image-gke-7.0Upgrade linux-image-generic-64k-hwe-26.04 | Sep 21, 2026 | Sep 18, 2026 |
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