CVE-2026-53317: wifi: mt76: mt7921: Place upper limit on station AID
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 IFTYPEAP interfaces, and the fix does not appear to have an effect on IFTYPESTATION behavior.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-53317?
CVE-2026-53317 has a risk rating of 27.
How do I fix CVE-2026-53317?
To fix CVE-2026-53317, ensure that the configured AID for any station does not exceed 20.
What systems are affected by CVE-2026-53317?
CVE-2026-53317 affects systems running the Linux kernel with the mt76: mt7921 driver.
What kind of issue does CVE-2026-53317 cause?
CVE-2026-53317 causes a firmware crash when a station is configured with an AID over 20.
When was CVE-2026-53317 published?
CVE-2026-53317 was published on June 26, 2026.