Bug 2536540 (CVE-2026-90375) - CVE-2026-90375 kernel: wifi: mt76: fix non-AQL packet accounting for MLO stations
Summary: CVE-2026-90375 kernel: wifi: mt76: fix non-AQL packet accounting for MLO stat...
Keywords:
Status: NEW
Alias: CVE-2026-90375
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-17 18:20 UTC by OSIDB Bzimport
Modified: 2026-10-20 10:57 UTC (History)
17 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2026-09-17 18:20:59 UTC
In the Linux kernel, the following vulnerability has been resolved:

wifi: mt76: fix non-AQL packet accounting for MLO stations

__mt76_tx_queue_skb() overrides the wcid passed by the driver with
sta->drv_priv, so the wcid might incorrectly be changed after TX,
causing wcid->non_aql_packets to be counted on the wrong wcid. For
example, on the AP side, if a station's setup link is the 5G link and
the station uses 2G to transmit a frame, the value of non_aql_packets
is increased on the 5G wcid but decreased on the 2G wcid. Once the
inflated counter exceeds MT_MAX_NON_AQL_PKT, the TX scheduler
permanently refuses to service the station.

Drop the reassignment and account on the wcid used for transmission.
This also records the actual wcid in the queue entry.


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