Vulnerability 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").
References
- https://git.kernel.org/stable/c/1a099d630b8667fa622662b85e35a0ef659fb343
- https://git.kernel.org/stable/c/39afc46c0243d10b7795e6e6cf4ae91f41732120
- https://git.kernel.org/stable/c/664f8bbc61e45e062679da512bf12f8f6fb26a1b
- https://git.kernel.org/stable/c/88c98ef247a3126fea9bbbda953a18a2f36c3ea7
- https://git.kernel.org/stable/c/a0b3e8d8726c3830102a18946c766c94c953c7f2
- https://git.kernel.org/stable/c/ab4d213393e846baa6437497f94dda7553cbeda7
- https://git.kernel.org/stable/c/b2ab73b8123ce6cf2bc32634bfee4928676ffa66
- https://git.kernel.org/stable/c/f2a72f47c5fb4ba6887e85bbe809d7e5b318d9d5
FAQ
What is CVE-2026-68195?
CVE-2026-68195 is a documented vulnerability. 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 mt761...
How severe is CVE-2026-68195?
CVSS scoring is not yet available for CVE-2026-68195. Check NVD for updates.
Is there a patch for CVE-2026-68195?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.