Description
In the Linux kernel, the following vulnerability has been resolved:
wifi: mt76: mt7925: drop TXRX_NOTIFY on non-mmio buses
PKT_TYPE_TXRX_NOTIFY is an mmio-only event, but mt7925_rx_check() and mt7925_queue_rx_skb() dispatch it to mt7925_mac_tx_free() on every bus. mt7925_mac_tx_free() cleans the DMA tx queues with mt76_queue_tx_cleanup(), which calls queue_ops->tx_cleanup(). Only the mmio queue ops implement that callback; on USB it is NULL, so a TXRX_NOTIFY there calls a NULL pointer in the RX worker:
BUG: kernel NULL pointer dereference, address: 0000000000000000 RIP: 0010:0x0 Call Trace: mt7925_mac_tx_free+0x58/0x350 [mt7925_common] mt7925_rx_check+0xe2/0x130 [mt7925_common] mt76u_rx_worker+0x1b9/0x620 [mt76_usb]
Drop the event on non-mmio buses via mt76_is_mmio(), as in commit 5683e1488aa9 ("wifi: mt76: connac: do not check WED status for non-mmio devices").
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= c948b5da6bbec742b433138e3e3f9537a85af2e5, < 0c8c4cd0ca60b45c4b05a39e3769b8473d6836eb; >= c948b5da6bbec742b433138e3e3f9537a85af2e5, < 9cb72f67e1502aabba51aab9ac04ae7c386ee194; >= c948b5da6bbec742b433138e3e3f9537a85af2e5, < 9677e86a5f7d680fe280a5f8999bc57353e360d7; >= c948b5da6bbec742b433138e3e3f9537a85af2e5, < feeff151c83e7f0ffcdedcad5343852d23d1f6e1 |
| Linux | Linux | 6.7 |
References
Timeline
- Published
- Aug 10, 2026
- Last modified
- Aug 17, 2026
- NVD status
- Received