CVE-2026-68195
Description
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7615: drop TXRX_NOTIFY on non-mmio buses PKT_TYPE_TXRX_NOTIFY is an mmio-only event, but mt7615_rx_check() and mt7615_queue_rx_skb() dispatch it to mt7615_mac_tx_free() on every bus. mt7615_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 the mt7663 USB and SDIO buses it is NULL, so a TXRX_NOTIFY there calls a NULL pointer in the RX worker. Same defect as the mt7921 and mt7925 patches in this series. 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").
How to fix
- Linux Linux664f8bbc61e45e062679da512bf12f8f6fb26a1b, 1a099d630b8667fa622662b85e35a0ef659fb343, a0b3e8d8726c3830102a18946c766c94c953c7f2, f2a72f47c5fb4ba6887e85bbe809d7e5b318d9d5, 88c98ef247a3126fea9bbbda953a18a2f36c3ea7, ab4d213393e846baa6437497f94dda7553cbeda7, b2ab73b8123ce6cf2bc32634bfee4928676ffa66, 39afc46c0243d10b7795e6e6cf4ae91f41732120 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | eb99cc95c3b6513b495c4839ac4917206705f657 ≤ v < 664f8bbc61e45e062679da512bf12f8f6fb26a1b, eb99cc95c3b6513b495c4839ac4917206705f657 ≤ v < 1a099d630b8667fa622662b85e35a0ef659fb343, eb99cc95c3b6513b495c4839ac4917206705f657 ≤ v < a0b3e8d8726c3830102a18946c766c94c953c7f2, eb99cc95c3b6513b495c4839ac4917206705f657 ≤ v < f2a72f47c5fb4ba6887e85bbe809d7e5b318d9d5, eb99cc95c3b6513b495c4839ac4917206705f657 ≤ v < 88c98ef247a3126fea9bbbda953a18a2f36c3ea7, eb99cc95c3b6513b495c4839ac4917206705f657 ≤ v < ab4d213393e846baa6437497f94dda7553cbeda7, eb99cc95c3b6513b495c4839ac4917206705f657 ≤ v < b2ab73b8123ce6cf2bc32634bfee4928676ffa66, eb99cc95c3b6513b495c4839ac4917206705f657 ≤ v < 39afc46c0243d10b7795e6e6cf4ae91f41732120, 5.8 | 664f8bbc61e45e062679da512bf12f8f6fb26a1b, 1a099d630b8667fa622662b85e35a0ef659fb343, a0b3e8d8726c3830102a18946c766c94c953c7f2, f2a72f47c5fb4ba6887e85bbe809d7e5b318d9d5, 88c98ef247a3126fea9bbbda953a18a2f36c3ea7, ab4d213393e846baa6437497f94dda7553cbeda7, b2ab73b8123ce6cf2bc32634bfee4928676ffa66, 39afc46c0243d10b7795e6e6cf4ae91f41732120 |
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