CVE-2026-68195

Summary

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").

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxeb99cc95c3b6513b495c4839ac4917206705f657 < 664f8bbc61e45e062679da512bf12f8f6fb26a1baffected
LinuxLinuxeb99cc95c3b6513b495c4839ac4917206705f657 < 1a099d630b8667fa622662b85e35a0ef659fb343affected
LinuxLinuxeb99cc95c3b6513b495c4839ac4917206705f657 < a0b3e8d8726c3830102a18946c766c94c953c7f2affected
LinuxLinuxeb99cc95c3b6513b495c4839ac4917206705f657 < f2a72f47c5fb4ba6887e85bbe809d7e5b318d9d5affected
LinuxLinuxeb99cc95c3b6513b495c4839ac4917206705f657 < 88c98ef247a3126fea9bbbda953a18a2f36c3ea7affected
LinuxLinuxeb99cc95c3b6513b495c4839ac4917206705f657 < ab4d213393e846baa6437497f94dda7553cbeda7affected
LinuxLinuxeb99cc95c3b6513b495c4839ac4917206705f657 < b2ab73b8123ce6cf2bc32634bfee4928676ffa66affected
LinuxLinuxeb99cc95c3b6513b495c4839ac4917206705f657 < 39afc46c0243d10b7795e6e6cf4ae91f41732120affected
LinuxLinux5.8affected
LinuxLinux0 < 5.8unaffected
LinuxLinux5.10.265 <= 5.10.*unaffected
LinuxLinux5.15.216 <= 5.15.*unaffected
LinuxLinux6.1.183 <= 6.1.*unaffected
LinuxLinux6.6.148 <= 6.6.*unaffected
LinuxLinux6.12.101 <= 6.12.*unaffected
LinuxLinux6.18.42 <= 6.18.*unaffected
LinuxLinux7.1.6 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References