CVE-2026-68195

wifi: mt76: mt7615: drop TXRX_NOTIFY on non-mmio buses

State: Published
Severity: Not scored
Published: Aug 10, 2026
Updated: Aug 19, 2026
Reserved: Jul 30, 2026

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").

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	eb99cc95c3b6513b495c4839ac4917206705f657 to before 664f8bbc61e45e062679da512bf12f8f6fb26a1bAffected eb99cc95c3b6513b495c4839ac4917206705f657 to before 1a099d630b8667fa622662b85e35a0ef659fb343Affected eb99cc95c3b6513b495c4839ac4917206705f657 to before a0b3e8d8726c3830102a18946c766c94c953c7f2Affected eb99cc95c3b6513b495c4839ac4917206705f657 to before f2a72f47c5fb4ba6887e85bbe809d7e5b318d9d5Affected eb99cc95c3b6513b495c4839ac4917206705f657 to before 88c98ef247a3126fea9bbbda953a18a2f36c3ea7Affected eb99cc95c3b6513b495c4839ac4917206705f657 to before ab4d213393e846baa6437497f94dda7553cbeda7Affected eb99cc95c3b6513b495c4839ac4917206705f657 to before b2ab73b8123ce6cf2bc32634bfee4928676ffa66Affected eb99cc95c3b6513b495c4839ac4917206705f657 to before 39afc46c0243d10b7795e6e6cf4ae91f41732120Affected
LinuxLinux	5.8Affected before 5.8Not affected 5.10.265 through 5.10.Not affected 5.15.216 through 5.15.Not affected 6.1.183 through 6.1.Not affected 6.6.148 through 6.6.Not affected 6.12.101 through 6.12.Not affected 6.18.42 through 6.18.Not affected 7.1.6 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

eb99cc95c3b6513b495c4839ac4917206705f657 to before 664f8bbc61e45e062679da512bf12f8f6fb26a1bAffected
eb99cc95c3b6513b495c4839ac4917206705f657 to before 1a099d630b8667fa622662b85e35a0ef659fb343Affected
eb99cc95c3b6513b495c4839ac4917206705f657 to before a0b3e8d8726c3830102a18946c766c94c953c7f2Affected
eb99cc95c3b6513b495c4839ac4917206705f657 to before f2a72f47c5fb4ba6887e85bbe809d7e5b318d9d5Affected
eb99cc95c3b6513b495c4839ac4917206705f657 to before 88c98ef247a3126fea9bbbda953a18a2f36c3ea7Affected
eb99cc95c3b6513b495c4839ac4917206705f657 to before ab4d213393e846baa6437497f94dda7553cbeda7Affected
eb99cc95c3b6513b495c4839ac4917206705f657 to before b2ab73b8123ce6cf2bc32634bfee4928676ffa66Affected
eb99cc95c3b6513b495c4839ac4917206705f657 to before 39afc46c0243d10b7795e6e6cf4ae91f41732120Affected

LinuxLinux

5.8Affected
before 5.8Not affected
5.10.265 through 5.10.*Not affected
5.15.216 through 5.15.*Not affected
6.1.183 through 6.1.*Not affected
6.6.148 through 6.6.*Not affected
6.12.101 through 6.12.*Not affected
6.18.42 through 6.18.*Not affected
7.1.6 through 7.1.*Not affected
7.2 and laterNot affected

References

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