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.
Fix
Patch, vendor advisory and mitigation references on NVD 4
- https://git.kernel.org/stable/c/1a4b802afe15c5b33b2dcb37a594aba2fa215d52 Patch
- https://git.kernel.org/stable/c/35835ff71e6e618155578b8e3905597edd5f601c Patch
- https://git.kernel.org/stable/c/4d0bf21e3e20619d51d06c0c36207aabab8b712c Patch
- https://git.kernel.org/stable/c/6dbe70f9ef14d8ac1c24bf19fd9510978a3ab952 Patch
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 4
- Cpes+1 CPE criteria (now 1)NVD modified 2026-10-21 13:19
- StatusPublished → ModifiedNVD modified 2026-10-21 13:19
- CVSS5.5 (v3.1, CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)NVD modified 2026-10-21 13:19
- First seenunscored · linuxNVD modified 2026-10-21 12:42
Affected (CPE criteria) 1
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
References 5
- https://git.kernel.org/stable/c/1a4b802afe15c5b33b2dcb37a594aba2fa215d52 Patch
- https://git.kernel.org/stable/c/35835ff71e6e618155578b8e3905597edd5f601c Patch
- https://git.kernel.org/stable/c/4d0bf21e3e20619d51d06c0c36207aabab8b712c Patch
- https://git.kernel.org/stable/c/6dbe70f9ef14d8ac1c24bf19fd9510978a3ab952 Patch
- https://git.kernel.org/stable/c/9d63dd026644fa612a1fd348d5d3ab5d73df7fb8