CVE-2026-53317

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

wifi: mt76: mt7921: Place upper limit on station AID

Any station configured with an AID over 20 causes a firmware crash.

This situation occurred in our testing using an AP interface on 7922

hardware, with a modified hostapd, sourced from Mediatek's OpenWRT

feeds.

In stock hostapd, station AIDs begin counting at 1, and this

configuration is prevented with an upper limit on associated stations.

However, the modified hostapd began allocation at 65, which caused the

firmware to crash. This fix does not allow these AIDs to work, but will

prevent the firmware crash.

This crash was only seen on IFTYPE_AP interfaces, and the fix does not

appear to have an effect on IFTYPE_STATION behavior.